A boy, a girl, a tramp and a piano with the most amazing effect on people, find each other in a park in a heatwave.

A demobbed soldier, Gordon Laid, returning from World War II meets Maxine Lupercal, a member of a traveling troupe of actors returning to England on the same ship. As Gordon closely resembles a member of the troupe of actors, mistaken identity causes him to become embroiled in various murders and an international espionage plot involving a cigarette lighter that strangely affects electricity. The action reaches its comical climax on stage with Gordon and his double as the spies and the police converge on the theatre is a desperate attempt to retrieve the missing cigarette lighter.

Henry Jekyll was always the outsider, a bungling and awkward buffoon, relegated to waiting for his invitation to participate in life that never arrived: until he discovers a medical formula developed by a dead uncle, which claimed to turn 'a man of timid disposition into a bold, fearless dragon'. Taking a draught of the elixir Henry is transformed into suave, sophisticated and highly desirable Teddy Hyde. Armed with his new persona, Teddy is ready to face the world; but is Henry ready for the consequences?