After fighting Retak'ka, Boboiboy managed to get all his elements or his siblings back from him. But he felt very exhausted for using too much power from Supra. Suddenly the cubes appeared right near him and took him away. He got ended up on the planet, which is contained the 7 elements. What will Boboiboy do on this planet? Wait for his friend to get him or help someone out
This story book is the side quest of The Elemental hero in Teyvat