For sixteen years Clara has lived in a psychiatric hospital because of her manic episodes. The day she is finally discharged, she sees her sister Olivia leap from a building. Olivia survives but sinks into a coma, and Clara uncovers the reason: Olivia's husband Vincent betrayed and deceived her. Clara decides to take her sister's place. She returns home pretending to be Olivia, and step by step she wins back the company shares Vincent had seized.
Along the way she exposes the misdeeds of Vincent's mistress, Layla. When Vincent takes Leo, Olivia's son, to force their hand, Clara teams up with the newly awakened Olivia to rescue the boy. Layla, who has escaped from prison, shoots Vincent in revenge. In the end the sisters and Leo begin a quieter life, and the poison that drove them apart finally drains away.
