Without any warning, the protagonist falls asleep — and wakes somewhere that is not her bedroom. She steps outside and is immediately killed by monsters. She wakes again in the same strange place. No matter how many times she steps through that door, the same terrifying deaths and moments of horror repeat. Others are caught in the same situation for their own reasons — strangers brought together by a trap none of them understand. Can they untangle what binds them here and find a way out of the nightmare?