At the Poni Breaker Coast, Gladion is taking on Hapu in a bid to win her grand trial. Hapu orders Golurk to use Flash Cannon, but Gladion's Z-Ring charges up first and Lycanroc lands a Devastating Drake attack. The two attacks collide, though only Golurk hits the ground. Hapu recalls Golurk and congratulates Gladion on his victory. He affirms that it was the final grand trial he needed to win. Hapu asks about his next venture and Gladion admits that there is one more thing he has to do before the Manalo Conference.
Over at Lillie's manor, Snowy stares at the still lifeless Magearna while Lillie continues to examine her father's journals for clues. She reads up on his theories about Magearna's soul heart being both its source of power and soul. Lillie's reflection is interrupted by Snowy's demands for attention, and she happily lifts Snowy onto her lap for a snuggle. Hobbes knocks on the study door to announce that Lillie's friends have arrived. Lillie explains that she and the girls are going to be practicing their Z-Moves in the backyard. Though Hobbes informs her that Ash and the other boys have also come over. Lillie arrives into a living room to greet her friends, and Lana admits that she invited the guys along for the support. They are all keen to get started on training, but Lillie replies that she would like them all to meet a Pokemon first. She guides them down to the hidden study room and introduces them all to Magearna. Everyone stares in surprise and Rotom takes several photos for its database. Lillie explains that Magearna was a gift she received from her father when she very young, though it has never moved. Hearing this, Ash decides to formally introduce himself to Magearna, so he gives it a gentle pat on the head. The others soon follow suit. Rotom draws everyone's attentions over to Mohn's journal. Lillie declares that she has two goals to achieve before her father's return, to master a Z-Move and reawaken Magearna.
Meanwhile, Professor Kukui gazes over the newly completed Manalo Stadium battlefield and is pleased to see his childhood dream finally being realized. The Team Rocket trio are nearby, selling delicious honey doughnuts to the gathering crowd. Jessie proudly presents their latest product, the special edition Manalo doughnut, shaped exactly like the stadium to commemorate the Alola League. The trio quickly sell their Manalo doughnuts to the hungry customers, and afterwards they declare that they are on a money winning idea. Later, Lusamine, Professor Burnet, Wicke, and Faba hop off their helicopter and reach the Manalo Stadium island.
Gladion and his Umbreon scour the Poni Island wilderness in their search for Mohn's missing Zoroark, hoping to fulfil a promise he made to his mother. The pair feel they are being watched, however a harmless Shiinotic emerges from the bushes. They pause again as a flock of Fletchling fly overhead, but Umbreon notices one Fletchling perched in a nearby tree. It stares for a moment before returning to Gladion's side to resume the search effort. Over at Lillie's place, the Z-Move practice is well underway. Mallow attempts to perform a Z-Move with Tsareena, however it fails to even charge. She is left disheartened, but Kiawe declares that she has made real progress. Lana and Sophocles practice, and the pair are impressed as Primarina and Vikavolt a fully formed Sparkling Aria and Zap Cannon attack respectively. Lillie is becoming increasingly nervous, and Ash's words of advice don't offer her much insight into performing a successful Z-Move. The practice is put on hold when Hobbes calls the children back inside. The group and their Pokémon gather around the television to watch Kukui officially unveil the Alola League and its home ground, the Manalo Stadium, to the public. Kukui declares that the League will be open to everyone. He also reveals that the crowned Champion will be participating in a special exhibition match afterwards against the Masked Royal. The thrilling announcement sends everyone into overdrive, with Lana, Ash and Kiawe particularly excited for the League. In a change of heart, Faba sets his sights on competing in order to battle against his idol. James also announces his intentions to compete, though his enthusiasm terrifies his teammates.
Meanwhile, Gladion's search for Zoroark continues. As he and Umbreon walk along a rocky beach, a Mandibuzz swoops in and prepares to attack. Umbreon uses Dark Pulse to neutralize the attack, but Mandibuzz enters into a Brave Bird. Gladion calls for a Shadow Ball attack, which hits its mark and Mandibuzz promptly leaves. Umbreon is prepared to give chase, but Gladion orders it to focus on finding Zoroark. A Dewgong appears in the water and bounds onto the shore before transforming into a Buneary. Umbreon turns back to see if they are being followed, but the Buneary goes undetected as it hides behind a large rock.
Mallow’s practice continues to falter as she struggles to raise enough Z-Power to even attack. A sudden frost fills the air, and everyone realizes that it is Lillie surrounded in a light blue light. Lillie concentrates her inner strength as she thinks of her father's words. She utters the sacred words and performs the Z-Pose before the Z-Power is successfully passed onto Snowy. Under a shroud of blue light, Snowy unleashes a frosty Subzero Slammer. Lillie is thrilled, having finally succeeded in one her goals as she hugs Snowy. She turns to Ash, admitting that she finally understands what her meant by the words "fwoosh" and "zap" earlier. Kiawe admits that Lillie is now off her provision Z-Ring licence and suggests she inform Hala of her achievement. Unknowingly, Magearna is beginning to flicker slightly because of Lillie's swelling confidence and perfection of her Z-Move.
Overnight and by a bonfire, Gladion and Umbreon are struggling to stay awake. Some snarls disturb the pair, and soon a Lurantis appears before them. It stares intently at Gladion, who orders Umbreon to fire a Dark Pulse at it. The attack causes Lurantis to reveals its true forme to actually be Mohn's long-lost Zoroark. Gladion steps forward to greet it, but Zoroark first shows him an illusion of Mohn and toddler Gladion helping Lusamine to comfort a crying baby Lillie. The touching family moment only affirms Zoroark's affections for Gladion and his family. Gladion reaches out his hand and pets Zoroark's cheek before nuzzling into its shoulder. Umbreon soon joins in, brushing itself up against Zoroark. Gladion informs Zoroark that Mohn is alive and requests its help with finding him. Zoroark promptly kneels down and bows its head to indicate that it wishes to assist.