Ginga Hagane and his friends have barely put Faust and the Spiral Core behind them when they pull a boy named Yuki out of a fight with a stranger called Johannes. Yuki is an astronomer as well as a Blader, and his Beyblade, Anubius, holds a piece of the Star Fragment he watched fall from the sky. He has come to tell them what the Fragment said to him: something is moving to revive the Black Sun and Nemesis, the god of destruction.