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.

If you could see the future, would you change it? That’s the dilemma facing Detective Inspector Rebecca Flint and astrophysicist Dr. Christian King when a series of rogue images transmitted into his laboratory from space, throw them together. The fragmented images appear to be of a major incident, but shockingly they suggest it has yet to happen; it’s in the future! It looks like they have just 18 hours to work out the clues and prevent a tragedy.