On the way to Canterbury during World War II, American G.I. Bob Johnson (John Sweet) mistakenly gets off the train in Chillingbourne, where he encounters British Sgt. Peter Gibbs (Dennis Price) and British land girl Alison Smith (Sheila Sim), who's working as a shopkeeper. When they're confronted with a serial criminal who puts glue in women's hair, and Alison becomes his newest victim, the travelers are drawn into a mystery that brings them closer together.