Fresh from a two-year stint in a mental institution for the alleged "mercy killing" of his ailing wife, Stephen Neale (Ray Milland) visits a carnival where he wins a cake by guessing its weight. The cake, however, contains a microfilm sought after by Nazi spies, and Stephen soon finds himself a target. On the run and unsure of whom to trust, he enlists the help of a private detective (Erskine Sanford), a beautiful woman (Marjorie Reynolds) and an inspector from Scotland Yard (Percy Waram).
Director: Fritz Lang
Writer: Seton I. Miller
Producer: Seton I. Miller
Cast: Ray Milland, Marjorie Reynolds, Carl Esmond, Hillary Brooke, Percy Waram, Dan Duryea, Alan Napier, Erskine Sanford, Thomas Louden, Aminta Dyne, Rita Johnson, Eustace Wyatt, Mary Field, Byron Foulger and Lester Matthews