And what joy is there in the New Year holidays? Two whole weeks of melancholy and idleness! And Sen and Tai’s girlfriends grow moldy without extreme sports. Good work turned up - a casual acquaintance ordered them to make inquiries about the young stepmother. A suspicious girl fooled her father's jeweler and turned him against his only son. Without expecting any catch, Sena and Taya take on innocent surveillance. And immediately they run into trouble - poisoned women begin to appear in the case, and the alleged murderer is like two peas in a pod like the jeweler’s wife. Was Vovchik really right and his young stepmother a villain the likes of which the world has never seen?