The key to earth's salvation lies within 10-star fragments that give the Legendary Bladers the right to fight on their chosen side; Gingka - he is one of these Legendary Bladers!
When a star falls from the sky, a young blader named Yuki is waiting for it. He immediately sets out to find Gingka, but this proves difficult as Gingka has been lured into a battle on an island against his old rival Kyoya.
S1E1 22 min