He Lixing retreats into ordinary city life, making an honest living repairing cars. After an unexpected accident, he follows his conscience and seeks justice, only to become entangled in a dangerous situation. Facing sudden crises and overwhelming odds, he steps forward with extraordinary skills and a calm mind to protect Xu Zhicheng. Their chance encounter uncovers a long-buried special identity, and together they face the ensuing turmoil, embarking on a new life of mutual protection.