Meadows is furious when a joint operation with Area Drugs to arrest local dealer Danny Rickman is blown out. Stamp and Quinnan attend a library where the attendant has discovered an emailed suicide note. When the IP address identifies the informant for the failed drugs raid, Meadows investigates it as a potential murder. The man's wife is quick to mention his terminal cancer diagnosis, but his daughter claims her step-mother was talking to him about euthenasia. Daly is suspicious when he spots Beech with Rickman, but while Beech and Meadows explain it was an authorised visit, Daly can't shake his suspicions that his colleague is up to no good. As Daly pursues Beech to a meet with Rickman, his cover is blown, and despite Beech revealing Rickman's driver is having an affair with the informant's wife, they end up coming to blows and Daly ends up in a riverside accident. As Daly tries to prove Beech is corrupt, his nemesis tries to track down the informant's true killer.