Bu Huan was once a manipulated puppet, living in numbness day after day. One day, he suddenly woke up and found to his horror that he had been lost. His memory of five years ago was blank, and what made him even more regretful was that during the five years he had been a puppet, he had become a killing tool for others. He tried his best to escape from the unhappy city, but his soul seemed to be entangled by a demon, and he was tortured every minute. In order to redeem his soul and explore who he really is, Bu Huan had to once again step into the Bu Huan city that he feared and hated. This time, can he break the shackles of darkness and find his true self?