Brighton-born master storyteller Peter James revisits his home city where two nine-year-old girls mysteriously disappeared in October 1986 and their bodies discovered in a local park the next day. With the help from the cases' lead police investigators, James unravels how officers came to suspect Russell Bishop as the killer, who sensationally walked free after the trial. His name resurfaced three years later when eerily similar circumstances occurred to a seven-year-old girl who survived. This episode takes viewers on the gruelling 30-year fight for justice.