A young woman is acquitted of the murder of her husband, who died in suspicious circumstances. The film then goes into Flashback (narrative) to portray the events leading up to his death. Sally Raynor's aviator husband Martin has been missing for two years and is believed dead, during which time she has fallen in love with a local doctor whom she plans to marry. When Martin unexpectedly returns from Brazil still alive, she decides to give up the doctor and go back to live with Martin. But soon, his erratic behaviour, brought on by his ordeals, makes Sally believe he is insane. On one of his wild nighttime walks, he appears to have killed someone. His wife plans to kill him to protect him from society's punishment, but before she does he commits suicide. Although innocent of his death, she is haunted by guilt and, even after a jury clears her of murder, she is hesitant to marry the doctor she loves.