D.S. Roach is interviewing a suspect, Barron, about a cash and gold bullion robbery. There's not enough evidence to charge him, and Barron knows it. Roach is desperate to find the link, and he asks D.C. Lines to do some unpaid overtime to help him. Lines is reluctant, as his eldest son is ill, but manages to square it with his wife. Roach and Lines visit one of Barron's associates, Halloran, in his nightclub, and Halloran gives them a name of someone who may have laundered the cash for Barron. Finding a laundrette at the address, they realise they've been had. Seeing police outside the house of Barron's ex, Cheryl Maynard, they discover that a neighbour has reported a robbery but Cheryl's saying nothing - it looks like Halloran has taken the money and gold. Roach releases Barron with his apologies, but takes great pleasure in mentioning Cheryl's empty cellar.