Summer vacation is here, and only four students, Yan Xiang, Xiao Chou, Nokia and 123, are left in the boarding school. Since the mysterious death of the granddaughter of school worker Aunt Fu and was abandoned in the refrigerator; and Aunt Fu's puppy was decapitated and Connie, a transfer student, arrived, a series of strange things have happened one after another. Yu Sir, who was investigating the case, narrowly encountered a traffic accident. When Connie's adoptive father learned about everything, he told them that Connie was the daughter of the devil. Everyone didn't believe it and accused him of deceiving the public for his heresy.