A neglectful mother concocts a plan to kill her live-in nanny when she discovers the nanny is having an affair with her husband.

Two twins lead separate lives since one of them blamed the other for the accidental death of his father. Years later, one carries a conventional family life while the other has a life of excess. When the first has an accident and is in a coma, the other does not scruple to take over her identity and steal her life.