After Oceanic Air flight 815 tore apart in mid-air and crashed on a Pacific island, its survivors were forced to find inner strength they never knew they had in order to survive. But they discovered that the island holds many secrets, including a mysterious smoke monster, polar bears, housing and hatches with electricity and hot & cold running water, a group of island residents known as "The Others," and a mysterious man named Jacob. The survivors have also found signs of those who came to the island before them, including a 19th century sailing ship called The Black Rock, a downed Beechcraft plane from a failed drug run, the remains of an ancient statue, as well as bunkers belonging to the Dharma Initiative -- a group of scientific researchers who inhabited the island in the recent past. They also encountered a freighter stationed off the island that some thought would lead to their rescue, but ultimately almost caused their extinction. The band of friends, family, enemies and strangers must continue to work together against all odds if they want to stay alive. But as they have discovered during their journey, nothing is what it seems, and danger and mystery loom behind every corner, with even those they thought could be trusted turning against them. Even heroes have secrets.