After Song Yu completed his last mission, he adopted his daughter Song Xiaoyu in a snowy street. At that time, she was ignorant, but she had bright eyes. Ten years later, Song Yu suddenly became a carefree otaku. But his daughter unexpectedly embarked on the path of a killer and became a cold killer. However, what her daughter doesn't know is that every time she performs a mission, killers from all over the world will always receive a mission, which is to protect her, otherwise they will face a nightmare disaster. No one knows Song Yu's true identity, and no one knows that he has titles one after another on his head: God of Cooking, King of Soldiers, God of Killing, Master of Music, Master of Treasure Appraisal, Hacker Expert, King of Technology, and all this is because he is a man with his own system!
