In 2000 BC, an ambitious but clumsy angel loses a box supposedly capable of causing doomsday, which he was supposed to use to kill of the last of humanity who survived the Great Flood. In 2015 AD, a thief named Coop seems to have found the box, and suddenly he finds himself in the company of the Department of Peculiar Science, who think the box is a bomb, or the apocalypse, or something. They don't know, but they do know that dark forces are out to get it, and Coop will have to steal it multiple times to keep it safe.