Li Aihan, the daughter of a powerful Mafia triad in China, is falsely accused of killing the boss of The Vipers, their main rival, and is threatened with deportation. Missing her mother, who had to leave the family for unknown reasons, she insists on traveling to New York, where she believes her mother is now, until things are resolved. When she arrives in New York, she is guided by you, who has been assigned a mission by your boss to protect her.