Gavin leads the survivors in trying to find Eve, Josh and Riley. Will he be able to finally reunite his family and still find a way back to the lives they once knew?
A traitor turning on the Survivors leads to a deadly confrontation as they're shocked to learn where Eve has been taken.
When a massive fire breaks out, forcing everyone to flee, Sam and Lucas lead the group's fight for survival. Gavin is kidnapped by a woman with a surprising connection to his old life who may hold the answers about Eve that he's been seeking.
An epic adventure begins when a massive sinkhole opens in the middle of Los Angeles, pulling hundreds of people and buildings into its depths. Those who fell in find themselves in a mysterious and dangerous primeval land, where they have no choice but to band together to survive. Meanwhile, the rest of the world desperately seeks to understand what happened. In the search for answers, one family torn apart by this disaster will have to unlock the secrets of this inexplicable event to find a way back to each other.