A new adventure is beginning within the wide world of Pokémon! Arriving at Indigo Academy, a little girl named Liko receives her first partner Pokémon, Sprigatito. But she soon finds herself pursued by the Explorers, a mysterious group that's determined to take the pendant necklace she wears. Liko isn't on her own, though, as Friede, Captain Pikachu, and the other Rising Volt Tacklers offer her protection aboard their airship. Meanwhile, a young boy named Roy dreams of becoming a Pokémon Trainer, unaware of the secret hiding within the Ancient Poké Ball he carries. As Liko, Roy, and the Rising Volt Tacklers set sail for new horizons, what kind of discoveries await?