Perfect Alibi

Also known as Das perfekte Alibi, 夺命谎言

Melanie is married to Keith Bauers, she has two beautiful children and she is rich. She decides to engage a girl au pair, Janine, who arrives from France. Everything seems to run perfectly. Janine looks shy and timid and well disposed towards the family. But casually Paula, Melanies's sister, finds out that Janine and Keith are lovers and afterwards she dies in an accident.