Medical student Melissa Knowles and her reluctant colleague Eric are making routine house calls to administer flu vaccines. When they step into Fred Hunt’s decaying, junk-crammed home, something immediately feels wrong. Fred seems like a harmless old recluse, but when Eric vanishes, Melissa’s search pulls her deeper into the house’s chaotic mess, revealing a labyrinth of tunnels carved through the piles of junk, twisting into suffocating darkness. And beneath it all, below the creaking floorboards, something stirs. Watching. Waiting.