Young, pleasant Nikki Collins (Deanna Durbin) witnesses a brutal murder while riding on a train on her way to New York City. Though she desperately tries to inform others of what she saw, no one believes her.
Fikria, a singer, is married to Farid, a gambling addict. While traveling by train, Fiktia suffers an injury. Upon returning home, Fikria's husband decides they should hide themselves so that he can get the insurance money needed to cover his debts.