A group of cheerful children lives in the magical world of a children’s TV show from 1999. Their best friend is an orange unicorn named Buddy, who is always ready to teach the kids something new and sing a song with them. When one boy disappears without a trace and a new girl appears in his place, the kids are horrified to learn that Buddy is a cold‑blooded killer. Meanwhile, an ordinary housewife, the mother of two sons, begins to be tormented by inexplicable anxiety.