After the teenagers in Kuye City reach the age of 10, they can be qualified to train Pokémon. The 10-year-old boy Yumu (surname) Lezi aims to become the most powerful Pokémon training master and is about to embark on a training journey. There are many puzzles and adventures waiting for them in the Pokémon world. Will they be greeted by light or darkness? Can Lezi become a Pokémon master as he wishes?