Upon her release from a mental institution where she was recovering from a suicide attempt, Andrea McBride applies for the position of nanny for a handsome, wealthy surgeon, Dr. James Lewis, a widower with two children. Another applicant is hired, but she dies in an accident and Andrea gets the job after all, excelling and quickly becoming part of the family. Then Lewis' girlfriend, Dr. Julia Bruning, is mysteriously killed. When his boss tells Lewis of impending cutbacks at the hospital, the boss is murdered. Meanwhile, Lewis' teenaged daughter Fawn begins piecing together the history of the new nanny and discovers that Andrea may be responsible for these and other killings - but Fawn had better hurry, because the slayings are getting closer to home

A seemingly perfect nanny goes to work for a couple with two young children, but her helpful personality eventually deteriorates into something sinister.

When Myriam, the mother of two young children, decides, despite the reluctance of her husband to resume his activity in a law firm, the couple is looking for a nanny. After a severe casting, they engage Louise, who quickly conquers the affection of children and gradually occupies a central place in the home. Gradually the trap of mutual dependence will close, until the tragedy.

The ambitious business consultant and single father Edgar Strack is desperately trying to reconcile family and work needs. Alone: ​​He does not succeed. His three adolescent children are frustrated, his new girlfriend Barbara complains, in the company he is betrayed by a competitor. In his distress, Edgar hired the spirited interpreter Ana, whom he had just fired as a colleague, as a new nanny. And lo and behold: Suddenly everything runs like clockwork again.