Ling Yumo, the top killer of the 21st century, is controlled by the Netherworld, the number one killer organization in the world. Abandoned by his parents since birth, he was adopted and personally trained by the leader of the underworld at the age of six, becoming a soul-level killer in the underworld. When he was eighteen years old, he discovered that he fell in love with the leader, but his confession was fruitless and he was rejected. "Don't think that because I personally trained you, you can violate my bottom line. You are not qualified to love me." He died to protect the leader at the age of twenty. After his death, he was reborn as the emperor of an imaginary dynasty. In this life, he not only had parents, but also a twin brother, Ling Yuze. Just as he was slowly integrating into the warmth of the family, the destined person who had been entangled with him his whole life appeared, forced his parents to death, and took him back to Weiyuan Villa to train him as a dead soldier.