P.C. Santini tries to apologize to W.P.C. Fox for going too far against her wishes the night before but she tells him to stay away from her. Santini obtains Fox's address from CAD and calls on her but she doesn't want to speak to him. Fox tells a Federation representative from Stafford Row about the assault but can't decide whether to make a formal complaint. The next day, the pair are assigned together. Santini loses a prisoner and blames it on Fox. Santini calls at Fox's flat that evening. She refuses to let him in. He threatens that if she wants a war, she's got a war.

W.P.C. Fox takes the day off with a migraine but turns up for the relief's paintball charity challenge, where Santini continues to bully and humiliate her. Her request not to be partnered with Santini is refused, and they are assigned together again the next day. Fox confides in W.D.C. Rawton. The relief are on the trail of a dangerous prisoner and Santini disregards the order not to separate from his partner. The man grabs Fox from behind and P.C.s Santini, Quinnan and Ashton run to the rescue when she screams for help. Fox manages to overpower the man. When challenged, Santini claims that he was with Fox when the prisoner appeared from nowhere.

W.P.C. Fox makes an official complaint about P.C. Santini.

As he and PC Quinnan investigate a burglar alarm, PC Eddie Santini sees Jessica Orton meeting covertly with Ferguson. Making excuses, Santini borrows the panda car and races to the Ortons' club where he confronts Jessica. As she storms off, there is a huge explosion. Santini is shocked when one of the officers assigned by AMIP to investigate the explosion is his old nemesis, DS Rosie Fox. Fox is suspiscious of Santini's involvement, but her colleagues put it down to the animosity between them. As Santini returns to his flat, where his lover PC Vicky Hagen is waiting, he is kidnapped by Ferguson who assigns him the task of picking up a consignment of drugs from Amsterdam.

Vicki Hagen finds Eddie Santini's tickets to Amsterdam, and questions him about them, but he is evasive. DCI Pallister takes DS Fox off the Jessica Orton case after her accusations against Santini, but she decides to do some investigation of her own. Santini, meanwhile, acquires a gun and some Class-A drugs to plant in Ferguson's boss's house when DS Timpney and the Area Drugs Squad raid it. Fox stumbles upon the house and is captured by Ferguson. His boss Mr Sherman is displeased that Santini allowed a police officer to find them. When Area Drugs arrive at Sun Hill for the raid, CID realise that both Santini and Fox are in trouble. Sure enough, Ferguson's radio scanner warns him of the forthcoming raid and he locks Santini in the same room as Fox. The two argue, but are pulled apart when Santini attacks Fox. She manages to escape, and Sherman's men are intercepted by SO19. Back at Sun Hill, Fox realises the keys in Hagen's possession are Jessica Orton's - and she arrests Santini for m

Santini tries to convince his lover, Jess Orton, to set him up with some drug dealers – he wants out of Sun Hill, and DS Timpney, his friend in Area Drugs, has promised him a place in the squad if Santini can get him evidence on them. However, before he has the chance, the Ortons' club is firebombed, and Santini is shocked when one of the officers assigned by AMIP to investigate the explosion is his old nemesis, DS Rosie Fox. Fox is convinced that Santini is linked to the events in question, but her AMIP DCI, Richard Pallister, believes otherwise. When Santini manages to locate Jess Orton, he persuades her to make a false confession to bombing the club in order to gain the trust of the suspected drug dealers.