An error of judgement by Det. Chief Supt. Barlow allowed bank robber George Prenter to slip through his fingers. An informant now tells him that Prenter will be brought into the country from a private airfield by Harry Owen.
D.S. Hawkins is investigating illegal immigrants at the docks when a woman's body is discovered murdered. W.D.S. Allin believes it could be the body of missing girl Marilyn Edwards but the dock security deny she ever entered.
