While at Poni Island, Sophocles decides he wants to evolve his Charjabug, so Hapu informs him that the electrical energy around Vast Poni Canyon will allow him to do so. Ash, Kiawe and Sophocles then head to the canyon where they find Horacio and his group who are in the canyon to do the same. At the same time, Lana decides to train her Popplio with her old friend Aya and her recently evolved Primarina. With Popplio learning to properly sing with Primarina, does it count as training? How will everyone's project turn out?

The Island Guardian of Poni Island has got a special power which lets people see loved ones that have long since passed from this world. When Mallow hears this, she gets really upset. As the group visit Hapu at her house, a mysterious mist soon comes from the Ruins of Hope. As they try to make their way through it, they all encounter someone important to them. Hapu, unhappy with this, goes to the Ruins of Hope to get Tapu Fini to stop. Will she be able to?