Episode one opens in the kitchen of a Chinese restaurant just as a man is murdered, drowned in a tank of live lobsters. He is Detective Sergeant Brendan McCabe. His killers are detectives Frank Agnew and Joe Geddes, McCabe's partner. Both are seeking revenge. They strap McCabe into his car, dump it in the sea and concoct an elaborate cover-up plan, confident that when the body is found, suicide will be the obvious verdict.