While Ash and Leon battle the rampaging Dynamax Pokémon, Goh and Sonia seek answers about the legends of Galar and the Darkest Day. Then, Ash meets Chairman Rose, the president of Macro Cosmos. Rose supported Leon as a young Trainer, but when he makes a similar offer to Ash, our hero politely declines.

Meanwhile, Goh and Sonia share their findings with Sonia’s grandmother, Professor Magnolia. Professor Magnolia previously worked with Rose’s company to create the Dynamax Band, but she now fears that Rose is somehow involved with the rampaging Pokémon. When Goh and Sonia head out to do more research, they’re confronted by a mysterious man—what happens next?