Despite her husband Ben’s past affairs, Kara lives a quiet and happy life with him and their 3-year old adopted daughter Riley. When Kara hires Alyssa, a new nanny for Riley, she has no idea that she is one of Ben’s past mistresses. Unaware of Alyssa’s connection to Ben, Kara is distraught by Alyssa’s action as the nanny oversteps her boundaries more and more everyday. It soon becomes clear that she is not here to take care of Riley. Instead, she wants to take Riley and Ben away from Kara. Will Alyssa succeed in stealing Kara’s family?