Blackwater City has been sealed off for ten years by mysterious descendants of immortals. Demonic creatures roam freely, officials collude with criminal gangs, and human lives are treated like merchandise. Lin Shu, a young man from the modern world, transmigrates into the body of a fake immortal in an opera troupe. Gravely injured and having lost his sanity, he unexpectedly obtains a Coin of Good and Evil, which allows him to deduce immortal techniques by killing the wicked and saving the innocent. Using ruthless methods to punish evil, he rises from being bullied by everyone to taking control of Four Directions Street, protecting women and children along the way. However, he gradually succumbs to the coin's temptation, while the sinister White Wolf Immortal within him is on the verge of awakening. Faced with the White Tiger Hall, which uses infants to make medicinal pills, a corrupt government, and the descendants of immortals, can Lin Shu hold on to his true self, recover his lost sanity, and save thousands of people trapped in the city?