Likeable 6th grader Liam writes to Santa asking him to prove that he's real. But Liam is dyslexic and accidentally sends his letter to Satan instead, who shows up at Liam's house, excited to have his first fanboy letter and wanting a little of Liam's soul.
Starring Jack Black, Robert Timothy Smith, Keegan-Michael Key, Brianne Howey, Hayes MacArthur, P.J. Byrne, Jaden Carson Baker, Kai Cech, Post Malone, Gavin Munn