When a bruised and battered man claiming to be Santa Clause is arrested for the murder of a child, the interrogating officers uncover a story more bizarre and horrific than expected. A violent Christmas rivalry between the forces of good and evil where the outcome hinges on a promise made decades ago.

The award-winning duo, Sam Chou and Ellery VanDooyeweert, team up again for another animated thriller, this time delving into the turbulent origins of old Father Frost himself.
In The Heat is adapted from a 2008 short story by Anna Starobinets.