Xu Chen, an ordinary college student, died in a car accident and was inexplicably bound to a system called "Nine Transformations of Rebirth". Each time the system restarts the life, there will be a dedicated task. If it is not completed, it will reset to zero and start again. At first, he was only looking for self-preservation and personal interests, but driven by reincarnation and missions, he became involved in the entanglement of family, friendship, love and dark forces. Opponent Gao Yuxiang also accidentally obtained another system, and the two fell into a game of developing parallel destinies. In each reincarnation, Xu Chen faces the "butterfly effect" at different nodes. As he gradually unlocks the truth of the system and the price behind rebirth, and at the same time, through redemption and decisions again and again, the protagonist gradually regains his original intention, and uses his own changes to influence the fate of the entire world line.