The Endeavour was a large transport ship that suddenly disappeared one day without a trace. Nobody knows at all what happened to it, and all the crew members and passangers disappeared along with the ship.
Pieces of the ship were found on different beaches around the suspected area disappeared, but even then, they couldn't find it. They concluded that the ship had been destroyed and everyone and everything on board was destroyed along with it.
But on an unknown island, many people wake up on the beach. Those people were the passangers and the crew from The Endeavour. Having no memory of what happened to the ship, or why they're there, they must work together to figure out the truth behind The Endeavour and what happened to it.
But that wont be so easy on an island filled with all different kinds of mamono, now will it?