It's a busy day on the station front desk, and P.C. Smith fails to notice that someone has left a hold-all next to the desk. When it is discovered, Insp. Frazer orders the station evacuated as a safety measure while the bomb squad is called in. Sgt. Cryer and W.P.C. Martella have trouble getting a violent female prisoner into and out of her cell. D.C. Dashwood winds Smith up about not noticing the bag, and he conducts an interview with a suspect in a car. P.C. Edwards is acting oddly, arguing with W.P.C. Ackland and he keeps returning to the station looking for something. SO13 find an incendiary device in the bag, but it explodes, blinding an SO13 officer.

Burnside arrests a man on suspicion of robbery with violence. Tosh and Carver get given wrong addresses. Burnside's suspect is identified in an id parade but she tells Jim his snout told her the suspect is guilty. It turns out he is not guilty of robbery with violence but his mum brings in her vacuum cleaner with drugs in the bottom. Reg chases a mother who tried to buy a watch with a stolen credit card and recognises her as a habitual criminal.

Supt. Adam Okaro makes a shock decision to resign after he is forced to toe the line on the drugs issue by the Borough Commander. PC Des Taviner suspects a judge is corrupt when the absence of a key witness sees a court case collapse. PC Cathy Bradford is delighted after spending the night with TDC Brandon Kane, but Kane is indifferent. When an old school friend of PC Ruby Buxton disappears after being robbed, Buxton finds her friend's mother is defensive about her daughter's whereabouts. When the bank mistakenly credits his account, will DC Ken Drummond take the money and run, or notify them of their mistake?