You wake up cold, weary, puzzled, in what looks like a hospital bed. You have no idea how you got here - your last memory is of a perfectly normal evening in the sleepy town of Bassethwaite. Around you are other beds, each containing a patient dressed like yourself in a white robe, each also waking up. You recognize some of them... but others look very peculiar indeed. There are no staff, and there is no clock. And there are no doors or windows...