In The Summoning Game, a group of Salem teenagers discover a cursed knife that releases a demon, which forces them to play horrific, deadly versions of children’s games where there can be no winners, only survivors. In the terrifying plot, Billie (Natalia Dyer) and Marcus (Asa Butterfield) are brothers who get involved in a demonic and dangerous game that ends up going too far. The family ends up destroyed after the children participate in the demonic game. The story of the film then follows the Salem family and its characters who become involved with the evil entity, whose objective is to play with its victims until their death.