S1 E4: The six bidders who'd been hiding in the storage room show themselves. When they learn that Hyungsoo is a detective, they become more suspicious.
Men are lured to a remote hotel under the guise of sexual encounters only to be caught in a trafficking ring where their organs are auctioned off to the highest bidder. After a catastrophic earthquake, the victims, traffickers and buyers all are trapped inside the crumbling building. Cut off from the outside world, they must fight to survive the aftermath at any cost.