He was once a national youth genius, but his career was ruined due to an international black whistle and he became a marginalized person. Five years later, when the national men's basketball team was defeated in the world arena again, he returned wearing the name of "The Reckoner". With the coldest attitude, he launched an iron-blooded reckoning that swept the global basketball world against all betrayers and injustices. And the girl who had witnessed his fall was holding a sharp blade, waiting to stand beside him.