What doesn't kill us still kills us. Some part of the soul that will never be the same... Sonya Shumilova immediately decided: she would go to a ball hosted by her childhood friend Dariush. You can forget about what happened twenty years ago, because then they were children and, probably, were not fully aware of their actions. The cruel jokes of Darik and his girlfriend, nicknamed Tanka-Kozyavka, the victims of which were all members of their dacha group, are a thing of the past, and this invitation to the ball is clear proof of this... As it turned out, Sonya was very mistaken! Darik and Tanka have only perfected their evil pranks, bringing Sonya to the extreme! But no matter how angry she was with her former friends, she would never decide to kill. And someone decided - Tanka-Kozyavka’s body was found in a clearing next to Sonya’s dacha...