Sgt. Cryer leads a raid to enforce an eviction order on a squat occupied by upper-class kids, watched by Councillor Thomas who is in charge of housing in the area. The raid is successful, but Thomas makes himself scarce as soon as a journalist arrives. P.C. Smith and P.C. Haynes are called to the local library where a homeless woman, Marie Tucker, and her kids are sheltering. Haynes moves her along by giving her a council housing brochure, but when they are called to a break-in at Councillor Thomas' home, they realise Marie has locked herself in the bathroom. Insp. Frazer arrives with a social worker who had reported Marie missing and they try to talk her out. When she goes quiet, they break down the door only to find Marie has taken an overdose and died.

W.P.C. Viv Martella and W.P.C. June Ackland report entry by artifice involving a bogus gasman to Acting D.I. Ted Roach. As Ackland and D.C. Mike Dashwood investigate the two latest cases, the widow of a gas inspector locks the bogus gasman in her basement. Insp. Christine Frazer has a serious talk to P.C. Pete Ramsey. There is a weapons amnesty bin outside the station, and when CID discovers a gun that was used in a robbery five years ago, Roach is determined to nail the suspect, Pat Duffy. Ch. Insp. Conway seeks legal advice as to whether the gun can be used as evidence as it was handed in during an amnesty. Roach disobeys Conway's orders and arrests Duffy. Conway is furious, but Roach tells him that they're in the clear as Duffy's ex-wife handed the gun in.