Semyon lives in a foster family. And this is his first real Home. Semyon was received very well and was given a separate room on the second floor of a spacious country house. He began to call his adoptive parents Ma and Pa and became friends with their only daughter, Li. Ma and Papa allowed Semyon to take a huge dog named Bucks with him from the shelter. How well everything was going. Until Rimma appeared, a distant relative who was left orphaned as a result of a terrible car accident. She seems to be the same age as Semyon, quiet and shy of everyone... But what if this is not an ordinary girl, but something fraught with eternal evil, from which there is no salvation?