"There is a cat inside a completely sealed box that one cannot see through. After one hour, there is a 50% chance that the cat will die. There is no way to tell whether the cat is dead or alive until you open the box. After one hour, in what state would you find the cat in the box?" The story revoles around a mansion, at which a cult claiming the world was ending, vanished one night, rumours about the place claimed that it was a criminals hideout or that there had been ghost sightings in the building. Girl sets off to the mansion with a camera, to film some paranormal activities when her exit changes into a storage room. With the help of a stranger, girl must try to survive and escape from the mansion and what lurks within it