"Old Cat" is dead. The legend falls, but the name lives on. The first person who pretended to be him couldn't even fire a gun and was shot dead by his employer. Lu Ming is the second one. I haven't eaten for three days, and I only have two steel coins in my pocket. In the underground boxing ring, after losing three out of four games, he lay on the ground like a dog. Everyone thought he would admit defeat. He stood up and knocked out with one punch. The middleman stared at him: "Are you really Lao Mao?" "It doesn't matter who I am," Lu Ming said, "What matters is that I can complete the task." He didn't know that Lao Mao was murdered. The man behind the scenes is called "The Boss" and his power spans five continents. He doesn't know that he is not an orphan. He is Lao Mao's biological son and the "boss"'s experimental subject. He only knows one thing: in this world, guns are better than logic. From impostor to successor, from "kitten" to "gun god". What he wants to prove is not that he is an old cat - he wants to prove that he is stronger than the old cat.