Tony Grant meets a lovely girl on the Spanish Steps in Rome. The encounter is mystifying, and when she leaves Tony fears he will never see her again. But then he receives an invitation to spend a weekend with a famous woman he has never met, and when he arrives at his host's dazzling villa, he once again encounters the girl from the Spanish Steps. Evil lurks within the halls of the sinister villa and the girl is involved, but Tony has to stay and confront the danger ahead for all of them.