Three weeks after an earthquake levels Los Angeles, two survivors - CASSIE (Sarah Wayne Callies) and WAYNE (David Harbour) are discovered on a newly formed island 13 miles off the California coast.  Also discovered is a cave full of dead bodies.

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Set onboard a naval ship, Cassie and Wayne are interrogated by CAPTAIN DOVER (Jeffrey Dean Morgan) about what transpired on the island.  But Dover slowly comes to realize the story he is being told may not be the full one as the events that happened on the island start to mirror themselves on the ship.