William Reynolds just wanted a quiet life. A good family, a steady job, and maybe a donut or two.

But when his kids are kidnapped, his wife is targeted, and an old enemy rises wearing a high-tech Santa suit, William is forced to dust off a past no one knew existed. Because William wasn't always just a dad?he was "Tank," a former black-ops operative trained to eliminate threats and disappear.

Now the man he once betrayed is back... and he's weaponized Christmas.

With time running out, a sarcastic team of misfit operatives, and a mall cop reputation to shake, William must fight to save his family and stop a holiday war no one saw coming.

Explosions. Elves. Emotional baggage.
This Christmas, the past isn't through with him?and neither is the Naughty List.