Madhouse Detective

A bizarre disappearance occurred in Qingya City. Su Wan, a young female algorithm engineer, walked into the mall bathroom. The surveillance camera captured her entering, but did not capture her coming out. No body, no blood, no witnesses. She seemed to have disappeared. The police investigated for three months and found nothing. Su Wan's sister Su Nian was desperate and heard a retired detective say: "Go to the Fourth Mental Health Center and find a person named Shen Yezhou." Shen Yezhou, a criminal investigation genius known as "Human CT" three years ago, solved 17 serial murder cases with a 100% detection rate. Now he was imprisoned in a lunatic asylum, carving lines on the concrete floor every day - thousands of floor plans of the same room. He said there was a ghost in that room, but he had no proof. Su Nian "fished" him out of the lunatic asylum. The condition is: he helps her find her sister, and she helps him return to the world. But what Su Nian didn't know was that Shen Yezhou went to the lunatic asylum not because he was crazy. It's because he found a truth that shouldn't exist, and the person who was chasing him has already arrived at the door.