Liang Sanshi is a real estate agent who is gloomy by nature. His greatest achievement in life is being scolded by his clients until he becomes autistic. One day, when he was selling a haunted house, he accidentally signed a contract with the remnant soul of a self-proclaimed "Demon Emperor" - from then on, he owned a portable prison, which contained the most vicious demons in ancient times.
But these demons only have a trace of their souls left, and they need Liang Sanshi to help them find their physical bodies in order to regain their freedom. In exchange, each demon will teach him a heaven-defying skill: the demon emperor teaches him to decipher people's hearts, the demon general teaches him to fight, the demon doctor teaches him to rejuvenate, and the demon merchant teaches him to turn stones into gold...
Liang Sanshi's unlucky life was rewritten! He uses the skills of demons to help the police solve crimes, help wealthy people treat illnesses, and help shopping malls turn around, all the way to counterattack. However, the conditions required for each demon's physical body to appear in this world are extremely demanding, and a slight carelessness can lead to death. What's even worse is that a mysterious organization called the "Jingshihui" that specializes in hunting "abnormal beings" has targeted him, and Liang Sanshi discovered that the leader of the Jingshihui who was chasing him turned out to be his long-lost brother...
