Hell is empty and all the devils are here. Fifteen years ago, a corrupt cabal of elites turned Duma City into a 'Hell Island,' leading to the brutal abuse and death of high school student Xiao Di. Fifteen years later, the puppet masters behind that tragedy are meeting gruesome ends, one by one. As Fang Tianyang, a witness to the past crime, and Officer Fang Zhengnan dig deeper, they realize these anonymous killings are not mere revenge—they are a long-overdue reckoning. Beneath the piling bodies and layers of cover-ups, just how many untold sins lie hidden within this dark web of power, money, and lust?