Story unfolds in the scorching heat of the Mexico border, where rival drug dealers Griff and Abbott arrive at a remote drop point for a routine drug deal. But when the exchange goes down, both reveal undercover badges — Griff is FBI, Abbott is DEA — and neither knew they were working the same case.

As their small Midwestern town prepares for its annual Christmas Eve parade, a sheriff and his deputy discover that a maniac in a Santa suit is murdering those he judges as naughty.

A year after a supermoon’s light activated a dormant gene, transforming humans into bloodthirsty werewolves and causing nearly a billion deaths, the nightmare resurfaces as the supermoon rises again. Two scientists attempt to stop the mutation but fail, leaving those exposed to the moonlight to once again become feral werewolves. Chaos engulfs the streets as the scientists struggle to reach one of their family homes, now under siege by the savage creatures.