The old red brick buildings in the demolition area are strange and forbidden places that are kept secret in the local area. Over the past ten years, tenants living in 404 have disappeared mysteriously one after another. The police have failed to file cases, and they have all become cold cases.
The heroine Lin Wan moves in for a low rent, but breaks the terrifying rules in the building after dark: the sound of wandering footsteps ringing on time at two o'clock in the morning, the endless loop of corridors in the middle of the night, and the secret peeping deep in the cracks in the door. There are no ghosts or gods in this building. In fact, it is a secret personality experiment that has been running for ten years.
The building hides precision pipes and sealed mezzanines, relying on fear to crush the minds of those who enter the game, stripping away people's emotions, memories and complete personalities. Those who were lucky enough to escape were left with only empty and numb bodies to survive; the trapped obsessions were trapped in the wall, begging for help day and night, and reincarnated forever.
During the step-by-step investigation, Lin Wan discovered the shocking truth: she was not a new tenant, but a special sample trapped in three reincarnations. The first two escapes made her abandon herself and carry a incomplete life.
In order to break the unsolvable dilemma and end the ten-year cycle, she defied everyone's survival instinct, faced the darkness and fear, and actively accepted the stripped and abandoned self. In the end, the ten-year experimental closed loop completely collapsed, the dangerous building came to an end, all the trapped echoes returned to peace, and all the lost people ushered in redemption and rebirth.
