When the beautiful Countess Angel's elderly husband dies, she begins to suspect that he was poisoned. Soon the young widow is accused of murdering her own husband, and then, in order to protect herself from her enemies, she invites a mysterious robber named Night Devil to enter into a fictitious marriage with her. And although the young people consider their marriage to be unreal, their love turns out to be the most genuine, and Angel, for the first time in his life, learns what passion is... But fate prepares cruel trials for the lovers.