Brownlow is angered when a local journalist approaches him following the publication of an article in the CPS journal regarding an unsolved case from twenty years previously. The case in question, an armed jewellery robbery, saw prime suspect Ray Catton imprisoned for the death of his two accomplices, but the loot remains unfound. Meanwhile, the man's daughter is being hassled by a loanshark, desperate for the repayment of the money she owes him. When Catton has a heart attack, he decides to reveal the location of the loot on his deathbed - unaware that his brother has returned to the country with the same purpose. Brownlow is determined to find and recover the loot before Catton's brother does.

Hollis and Hagen are laughed off by CID when they provide a tipoff on an upcoming armed robbery at a casino, provided by former getaway driver Jerry Mulligan, after he is arrested for stealing a milk float. However, it comes back to haunt them when a casino is robbed overnight, with Hollis wasting no time in mentioning CID's indiscretion to a furious Burnside. He tasks Lennox and McCann, on attachment to CID, with tracking Mulligan down. He provides info on another raid, so Burnside leads an undercover team there to catch the gang in the act, but Mulligan is attacked and the gang make a breakaway, leaving Burnside to pick up the pieces.