freeOK概要：A group of young people participate in a costume joke that ends in a fatal accident and a silent agreement. Afterwards, they are threatened by an anonymous author who wants to reveal his dark secrets. Their pursuers threatened to publish a bloody horror novel based on them on social media. Every chapter will have a death. While distrusting each other, this group of people will embark on a survival battle in the middle of the university campus. Any one of them may be the next victim or the perpetrator.
