Xie Shaohui was taking his pregnant wife to the hospital on his motorcycle when a runaway heavy truck hit them and sent them flying.
Liu Ruping's body urgently activated its childbirth program, and she delivered the baby at the instant her body hit the ground.
After the couple fell, they hurriedly crawled toward the baby, only to find their hands passing right through its body. It turned out they had both died on the spot and become spirits.
The Black and White Impermanence told them that their child was a koi destined to leap through the Dragon Gate. The koi carried good fortune, but had weak ties to family. If successful, he would rise to a position of power, stir up the world, and bring good luck to those around him. If he failed, he would return with a mark on his forehead, suffer a lifetime of misfortune, and might even die young. If his parents used up some of their own lifespans to help him, he might succeed. If they refused, they could be reborn into a good family. If they helped him, however, they could only be reborn as livestock, destined to be slaughtered.
The couple chose to spend their own lifespans helping their son, guiding him through one trial after another. At last, they ensured that he was adopted by Fang Huanan, a university-educated village official. With their lifespans exhausted, they were both reborn into the animal realm.
From then on, Fang Huanan rose steadily through the ranks and married a wealthy heiress. Eventually, the protagonist's adoptive father attained a position of power, and his adoptive mother became the world's richest person. As for him, apart from serving as a lucky mascot at his adoptive parents' side, he was interested only in ancient martial arts.
One day, as he passed a dog meat restaurant, two local dogs in a cage, waiting to be slaughtered, barked furiously at him, tears streaming from their eyes. The instant he touched one of their heads, his mind erupted, and he saw the truth of fate. Determined to help his parents escape the cycle of reincarnation, he resolutely joined the police service, becoming an ordinary patrol officer in the "National Ecological Strategy General Administration's Overseas Covert Security and Duty System." He searched the entire world for a way to save his parents.