A clueless man believes his wife left him and took the kids, unaware that his malicious alter ego actually murdered them during his "sleepwalking" episodes and hid the bodies inside a newly built wine cellar.

Matt and Margaret are looking for a house to die for. Stanley has exactly what they need.When the young newlyweds arrive at an isolated, decaying fixer-upper, the eccentric seller guides them down into the suffocating dark of the basement. But what lies beneath the floorboards changes everything. In this pitch-black thriller, a routine real estate viewing turns into a lethal game of cat and mouse—where the trapped are far more dangerous than the trap itself.