Four seasoned killers and one hapless professor are rounded up in one violent swoop and awake in chains to discover they are part of a demented experiment orchestrated by their maniacal, mysterious captor.

A simple act of kindness always sparks another, even in a frozen, faraway place. When Smeerensburg's new postman, Jesper, befriends toymaker Klaus, their gifts melt an age-old feud and deliver a sleigh full of holiday traditions.