After the mysterious death of Lunthom, a powerful businesswoman, Rossukhon—her husband Cheev’s longtime secret lover—is finally invited to step into the life she’s always dreamed of. But when she arrives at his secluded vacation home, Rossukhon is horrified to find Lunthom’s body preserved in a glass coffin. Bound by a chilling clause in Lunthom’s will, Cheev insists they must care for her corpse for 100 days to secure his inheritance. As Rossukhon battles fear, jealousy, and a growing sense of dread, the house begins to reveal dark secrets, and the past refuses to stay buried.