A WWII pilot, bombardier, and radioman find themselves adrift on a lifeboat without food or water after being forced to ditch their plane during a scouting mission.
Young Noa and Michael are put in the care of their new nanny, Leonor, who Noa suspects is a malicious supernatural being. Dismissed by those around her, Noa works to uncover Leonor's true identity, but soon finds herself with far more than she bargained for.
Some years ago, the world experienced a "day of reckoning" when creatures came up from below and purged humanity of evil. Now, it is happening again.
