A great demon knocks on the city, bottom-tier night watchman Li Yi accidentally picks up the severely injured Demon Subduing Bureau female sword immortal who fell into the city, and activates the anti-routine demon suppression system. Encountering demon soldiers demanding lives at night, not afraid, he turns around and offers the bully neighbor as a scapegoat. Demon money demanding a life? No rush, he turns around and drops it into the demon suppression merit box. The Black Wind great demon disguises as a vanguard to probe the way, who knew he was tricked into the ancient demon-imprisoning array at the bottom of the city.