Detective Superintendent Sandra Pullman’s unconventional team of ex detectives may be eccentric, bend the rules, ignore procedure, follow their hunches and take risks, but they get results. UCOS (the Unsolved Crime and Open Case Squad) has the best clear-up rate in the Force. Series 7 sees them reopening the files on the death of a boxer, the high-profile abduction of a debutante in 1983, a fraudulent businessman, the murder of a celebrated graffiti artist, the abduction and murder of a five-year-old boy, the stabbing of an 80s fashion designer, and the suspicious suicide of a college professor.