In the opening scene, the lovey-dovey couple Chloe and Dove, along with Chris and Gail, are playing a trivia game at the bar. When Holly walks in, Gail goes over to buy her a drink. However, Holly declines because she's meeting someone. As she heads off with another woman, Gail looks on in what could either be jealousy that Holly has someone or jealousy that Holly has someone else.
She returns to the rookies, where Chris has told the trivia-master Dove that he's lost to Chloe. Gail says, in her usually snarky way, "The king of the dorks has found his queen, the nerd empire can rejoice."
Cut to Nick and Andy in bed together the following morning, seemingly in a post-coitus state. Andy is still troubled about what happened with Marlo and Nick tries to comfort her. She declares that she's going to be an on-the-books cop. Nick suggests it's the new her but she says, "actually it's the old me, I just got distracted. I'm not going to get distracted anymore." The two then get playfully romantic again.
Elsewhere, Sam is with Marlo as she prepares to stay with her sister for some time, under the guise that she's on leave taking care of family matters. Marlo rejects all of Sam's attempts to help her, claiming she needs space, and leaves him with merely a kiss on the cheek.
Next, Traci arrives at the station with her son Leo in tow, and when Steve passes by her office, he offers to take him on a tour of Guns and Gangs. She declines with a lame excuse, to his disappointment.
At the end of parade, Oliver tells Frank that Celery is staying at his place while hers is fumigated, to which Frank reminds him that Zoey, Oliver's ex wife, moved in with him after only a few dates. Oliver then asks how Noelle is doing and Frank says she doesn't have cancer but the doctors are going to keep an eye on her.
Cut to Chloe and Andy in a squad car. Chloe bluntly asks Andy how long she and Nick have been doing it, because Andy's been glowing lately and Nick looks more "accomplished." Chloe persists over Andy's denials until Andy is saved by a dispatch call about a man sleeping in the park. When they approach him, sitting against a tree, they discover it's only a bundle of clothes. As they are walking back to their car, Andy hears something. She turns around and finds Chloe holding her bleeding neck. Before Andy can react, a bullet hits Chloe again and she collapses, followed by an outburst of gunshots and resulting chaos. Andy drags Chloe to cover and radios for help. Chris and Nick go after the shooter, but he's gone by the time they reach the roof he'd been firing from. Meanwhile, Chloe loses consciousness just as Oliver and Gail arrive with medics right behind them.
At the station, Frank tells Dove about what happened and says Chris is on his way to take him to the hospital.
Sam arrives at the crime scene and deduces that the 911 call was clearly a setup to target the officers.
While Nick is trying to console Andy, who feels like she could have done more to help Chloe, he notices she was grazed with a bullet herself on the side of her uniform. In a panic, he expresses how close she came to also being seriously injured. She doesn't want to report it because she'll be tied up in paperwork but Nick convinces her otherwise.
On the roof, Traci tells Sam that the bullet shells found came from a hunting rifle, and that the building's security footage only covers the parking garage, lobby, and elevators, implying that if he took the stairs, they don't have him on camera. Because the doors of the building had been propped open by a maintenance crew all week, it's also evident that the ambush was well-planned. Sam is hopeful that witnesses at least saw the shooter prep the dummy.
At the hospital, the doctor tells Dove that the bullet managed to tear through Chloe's neck without hitting an artery. He says they're going to try to repair the damage but there's a risk of swelling against her spinal cord.
Elsewhere, as Gail worries about what will happen to Dove if Chloe doesn't make it, she and Oliver get a 911 call and head to the location to respond. As soon as Oliver steps out of the car, a bullet just misses him. He throws himself back in the squad car and they find cover as they call in the attack.
Detective Luke Callaghan arrives at the station to help out and Sam tells him that rifle shells of the same caliber were found at the park and the location where Gail and Oliver were attacked. Then Sam and Frank tell him that both 911 calls came from a man and trace back to unregistered phones. Luke asks who might have a grudge against 15 Division and Sam mentions their takedown of Jackson Irving and other members of the Dowling gang, but Luke points out that a hunting rifle isn't very gang-like. Sam agrees, explaining that they've expanded the search. Luke closes out the scene by stating the obvious: someone is targeting 15 Division so the case is a priority.
At the hospital, Dove confronts a man yelling at a clerk about Chloe. He says he's Wes (Wesley) Cole, her partner at her old unit. He then explains that the hospital contacted him and when Dove questions why he'd be her emergency contact, Wesley reveals that Chloe's his wife, leaving Dove utterly dumbstruck.
At the station, Frank holds a meeting with all of his officers. He says Chloe's still in surgery, the shooter is out there and may be targeting others or all of 15, and that they are still working on a list of suspects. He says they are getting help from all other divisions and that all 911 calls must now have at least two cars respond. As he says "Let's all come home tonight," Nick gazes towards Andy.
When Gail heads out of the meeting she sees Holly, who says she's dropping off a file. When Gail asks why the courier didn't just do it, Holly pulls her into an investigation room. She asks Gail if someone is really hunting them and Gail admits officers were shot at. When Holly realizes Gail was one of them she becomes distraught and starts rambling about the girl Gail had seen her with and how it meant nothing. Gail cuts her off by grabbing and kissing her. (Now, I like Holly and I think this 'Gail experiments' plot line is somewhat intriguing but it's a little forced. Still, I'll reserve judgment until we see where it goes.)
Oliver sees Gail exit the room and as he's talking to her, Holly exits. Gail makes an excuse and walks away, leaving Oliver bewildered.
As Traci is gearing up, Steve approaches her, asking what she's doing. She says she requested to help out on the streets since she isn't needed in the office. She then accepts Steve's invitation to be his partner on a mission to find out if the Dowling guys are behind the shootings.
In the locker room, Chris finds Nick writing in his vest, in keeping with his old platoon's tradition of writing prayers or messages to loved ones in case something happened to them. Then, when Frank orders Andy to office duty since she was hit earlier, public-be-damned, she kisses Nick goodbye and pleads for him to be careful. He walks away and Sam is seen in the background looking towards them.
The officers head out in squad cars as 911 calls play in the background, ominously.
Cut to Steve and Traci. Steve's been informed that Irving's cousin has taken over the gang but ordered everyone to lay low. Traci says even a rogue member would know that defying a direct order from the gang leader would bring the crew down harder on him than the police. Then, abruptly Steve asks Traci why she doesn't want him to meet Leo, to which Traci says he doesn't want him getting attached to someone unless she knows it's going somewhere. Steve insists that if she wants it to, it is going somewhere, so Traci invites him to join them for dinner one night when things calm down.
Meanwhile, Dove still hasn't told Wesley about his relationship with Chloe, but asks him about their marriage. Wesley explains that they were partners for a while, then started seeing each other on and off, and after back-to-back all-nighters they went to Niagara to blow off steam. That night, they found a wedding chapel and drunkenly got married. Dove is somewhat relieved and the men reflect about how good Chloe is at having—and spreading—fun.
In the squad car, Oliver starts talking about how sometimes you end up in a relationship with someone you wouldn't expect or who others wouldn't expect. Gail does not like where he's headed, grimacing as he says "who cares what people think as long as you're happy, 'course it's gonna mean some life changes." When he brings up his own situation, Gail is relieved and says, "we're talking about you...," to which Oliver slyly responds, "Who'd you think we were talking about?" She's saved by a dispatch call about 'unknown trouble.' It seems suspicious but Gail and Oliver move inside the apartment building from which the call came before Chris arrives as backup. Cautiously, they enter the room and find an unconscious elder man on the floor, with a little girl standing nearby, frightened. She turns out to be mute, answering the mystery of why there was no voice on the 911 call.
Back at the hospital, Wesley confesses to Dove that he was always crazy about Chloe but pretended he wasn't. He says he doesn't know why he let her get away, and that maybe this is his second chance, implying he wants to get her back. Dove merely walks away sad and worried instead of defending his own relationship with her.
As Luke and Sam are going over recent evidence, Celery arrives at the station causing a commotion. Andy approaches her and Celery informs her that she caught some guy hanging around Oliver's place in a van. When she confronted him, he grabbed her and demanded to know where Oliver was, saying that he should be home by now because of what happened. He took off when neighbors came out. Celery describes him as being tall, white, with brown hair, a shaggy beard and stitches on his head. After having Celery look at pictures, Andy approaches Luke and Sam declaring that the shooter is Kevin Ford; Celery is certain of her id. When Luke leaves to get teams moving, Andy tells Sam that if it's Ford, his grudge could be because of Marlo and she could be his next or main target. Andy calls Nick and sends him to Marlo's while she and Sam head to her sister's place. Sam is shocked that she told Nick about Marlo.
Nick discovers that someone broke into Marlo's house and tore it apart. He asks if he should call it in, since that means officers will comb through everything about her. Sam reluctantly gives the okay, and soon realizes if it was Ford, he'd have found out where Marlo is because she left a note for the neighbors.
Cut to Marlo in a bathrobe, listening to music turned up loud. She hears banging outside which frightens her, but it's Sam and Andy. They fill her in on what's happening and Marlo doesn't think Ford would be the shooter. Accusingly, Andy says, "unless someone really pissed him off." Then Sam warns Marlo that Ford's been to her place and soon the police will be too.
Elsewhere, Oliver arrives at Marlo's to back up Nick. As he approaches the house, Ford shows up behind him with a rifle, blames him and the police for setting him up, and in the final moment of the episode, he knocks Oliver unconscious.
(Poor Oliver and Chloe, though it's fitting that the writers chose to give the life-threatening situations to practically the only two characters left that really bad things haven't happened to yet. I hope they both make it out alive!)
Tune in next week for the season four finale, 'You can see the stars.'
Image credit: ABC Medianet