Travis, Madison, and their blended family set sail on Strand's boat off the coast of California in an effort to escape the apocalypse. While they're looking for safety, they only find more trouble at sea.
The group seeks shelter with a survivalist family. Madison tries to uncover the family's true motives. Meanwhile, Salazar works to discover Strand's intentions.
Refugees begin flooding into the hotel the group is staying at, and they recognize a familiar face among them. Madison has a hard time dealing with the entire situation.