D.S. Roach goes to the hospital to talk to a young man who was slashed in the face with a knife - the fifth is a series of ""steamer"" attacks, where knife-wielding youths have held up restaurant patrons. D.C. Dashwood receives a tip-off about the steamers' next target, and the restuarant is filled with undercover police officers. P.C. Edwards is jealous that he and Carver didn't get a free meal paid for by the Met, and the steamers are caught when they raid the restuarant. P.C. Melvin investigates a strange smell from a flat used by junkies, and finds the body of an elderly man who suffered a heart attack. Melvin can't believe the old man was a junkie.

After Beech hands himself into CIB, Stanton is horrified when Beech convinces Hodges to ensnare Fallon, along with two Drugs Squad officers on Fallon's payroll, in exchange for a full confession of his crimes. He meets with DI Tasker and DS Garrard to arrange a double cross, working out that Fallon must have been who gave him up to AMIP. After being caught with a phone whilst attending the funeral of Boulton, Hodges threatens to pull the deal, until Beech falsely offers up the Drugs Squad DCI. Stealing the money for a drug deal, Beech attends a warehouse with Fallon, who tries to kill him. When Tasker and Garrard rescue Beech, they tie up Fallon and his associates, before Beech turns on his rescuers. When shots ring out, CIB and SO19 storm in, with Hodges and Stanton left furious when Beech is nowhere to be seen.