In a seemingly peaceful campus in a bustling city, student Wu Yuan accidentally became the only survivor in Room 304 of a haunted house, only to find that a countdown appeared on his left wrist, pointing to the coordinates of the next haunted house. Police investigation found that the victim's cochlea contained a microchip that played back inexplicable childhood memories. Wu Yuan relies on his keen observation and struggles to explore the truth under the pressure of campus undercurrents and complex adult social rules. In order to achieve their goals, the evil organization hidden in the campus used the haunted house to continuously cause deaths and hinder Wu Yuan's actions. As the countdown approaches, the 13th haunted house is about to descend on the apartment where he lives. If the secret cannot be revealed within 71 hours, he and more innocent people will die. During the investigation, Wu Yuan was misunderstood by the police and people around him, and faced a crisis of trust. But with his tenacity, he struggled with fear and hope, never letting go of any clues. Even if it may ultimately succeed, it may not be able to save all lives, and the price will be heavy. He made a desperate move and launched a life-and-death contest with unknown evil forces, fighting to the last moment to survive and uncover the truth.
