The movie is adapted from the popular comic "The City of Innocence". It tells the story of an international financial tycoon Solan who built an "Innocent City" without legal restrictions on an isolated island in the Pacific Ocean. Many wanted criminals went there to seek asylum. International special forces soldier Tang Ke went undercover in the City of Innocence with the purpose of dismissing criminals. However, when performing the mission, he unfortunately fell into Solan's trap. Tang Ke tried his best to escape from the secret room, but found that he was injected with poison and had only a few hours left to live. His wife was killed by Solan and his daughter was kidnapped. Tang Ke, who was desperate, embarked on the road of revenge.