Fang Youtong, a forty-year-old bachelor who has been single for years and is now supposedly wise to the ways of the world, receives an anonymously mailed novel on his birthday. Its protagonist has the same name as him.
That night, Fang Youtong is killed while trying to help someone in danger.
When he wakes up, Fang Youtong finds himself turned into the protagonist of that novel: a mute high school student from a poor family who is bullied at school.
He has just swallowed a large handful of sleeping pills, and beside him is the suicide note written by the original owner of the body.
Fang Youtong: ...
He thinks he can still be saved.
In a panic, Fang Youtong tries to call 120 for an ambulance. Then a cold, aloof woman who looks exactly like his dearly departed wife appears out of nowhere and forces him to sign some mysterious contract.
From then on, he can leap across rooftops, is armed with Huoxiang Zhengqi, and has a body full of high-tech gear worthy of Iron Man.
Fang Youtong never expected that, at forty, he would still get smacked in the face with such a classic golden finger comeback story.
The youthful energy coming at him full force leaves this old-timer, dredged up from society's great cesspool, struggling to adjust.
From then on, his mission is to hunt down the "illegal crossers" in the book alongside his contract partner, Gu Xinghe, the woman with his dead wife's face who forced him to sign the contract.
In the cold wind, Gu Xinghe's thin trench coat flaps in the breeze. She moves like a shooting star, swift and graceful, covering a thousand miles without a trace.
Fang Youtong blinks his big, droopy puppy-dog eyes and raises his thermos of red dates and goji berries to offer a kind reminder: "If you keep going bare-legged in the middle of winter, you'll end up with arthritis when you're older."
Theme: The essence of fate is choice.