Nadezhda Polyakova works as an investigator while raising three children. She was left alone after her husband, police officer Sergei Polyakov, grew tired of routine and decided to have some fun with the attractive businesswoman Angela. Nadya decided to throw Sergei out. She can provide for her family on her own: after all, work was once her true passion. But this angers her ex-husband: he strongly disapproves of the dangerous profession of the mother of his children, and besides, he sees that Nadya has caught the eye of her boss…