In the Cosmos, an unusual event has occurred. Taking a break from their latest triumph over Faust and the Spiral Core, Gingka and Co. find themselves saving a boy named Yuki Mizusawa from a mysterious youth named Johannes. Although Yuki is a boy genius and an astronomer, he is a Blader who owns Mercury Anubius 85XF. Yuki says that he has come to tell Gingka and his friends about the voice of the Star Fragment. He witnessed the Star Fragment (a meteor) fall from the sky one day. That single light dwells within Anubius and he says that he heard the voice of the Star Fragment that evening. A great evil is trying to revive the “Black Sun” and “Nemesis”, the god of destruction, by using the unknown power of the Star Fragment to destroy the world. Gingka and his friends must fight again, just as soon as they get the hang of their new 4D System Beys!