Gu Yanchuan, at thirty-eight years old, finds his marriage reaching its end. His wife, Shen Wantang, sets a trap to gather evidence and insists on divorcing him. Just as he looks at his bloated, decadent self with a heart full of sorrow, the Nine-Tailed White Fox system descends, unlocking the wild youth system where completing missions allows him to reverse his age and return to twenty. After the divorce, he mounts a motorcycle sealed away for many years and must also help his son, Gu Xingye, who is deeply trapped in a love-brain state, see reality clearly. Father and son break through barriers all the way; while Gu Yanchuan recovers his youthful passion and sharpness, he also learns to repair his relationship with his child, restarting a different middle-aged life.