Lucy was a wealthy heiress — until her husband Tom convinced her the apocalypse had come and locked her in the basement for three years. Chained, beaten, eating dog food, she worshipped him as her savior. Meanwhile, Tom was living upstairs with her stepmother Monica, using Lucy's identity to drain her trust fund. One night, Tom left the door ajar. Lucy slipped out — and found no apocalypse, just Tom and Monica on the couch. She learned they murdered her father, faked everything, and planned to keep stealing. Lucy returned to the basement, laid a trap, then escaped and locked them inside. She cut off water and power, played terror sounds, forced them to torture each other. Tom and Monica killed each other. Lucy sealed the basement, sold the mansion, and moved on. Three years later, police found the remains — and closed the case. Lucy was long gone, living a new life.
