In order to save his son from a car accident, Mayor Li accidentally killed him. Under the pressure of time, he had to cut in line and steal the man's son's heart. From the gun heart, the mayor is a bad person. But from the perspective of saving his son, it shows the love of his father. To this end, he is willing to face the protagonist's gun, want to pay the price for his son's life, and is willing to make efforts for two generations to give up the position of mayor, all just to save his son.

At the end of the movie:

As a result, the mayor's son was saved, and Lin Rilang sacrificed himself and transplanted his heart to his son Bouguer. The mayor, secretary, director and dean were sentenced.

The child needs a heart transplant, and the cost of the operation is 3 million yuan. In order to save their son, they sold houses, sold blood and borrowed usury. Finally, they got enough money to come to the hospital, but the defendant's heart originally belonged to his son, but someone else took it away. Lin Rilang planned a "kidnapping case" to save his son. In fact, Lin Rilang has long known that this heart cannot be recovered. He deliberately tried to die just to save his son with his own heart.