Scooby-Doo and Shaggy Rogers travel to Japan on the ultimate foodie adventure, but their enthusiastic eating accidentally releases hundreds of mischievous mythical monsters that scatter across the country. To contain the chaos, the pair must capture each creature before the supernatural outbreak spirals out of control. They are joined by Daisuke-Doo, Scooby's uncle who knows the local folklore; Yume, a magical girl with mysterious powers; and Takumi, a technology expert who builds gadgets for the hunt. Together, this unlikely team chases yokai and other creatures inspired by Japanese mythology, blending classic Scooby-Doo slapstick with a fresh cultural setting. The story unfolds as a series of monster hunts, each revealing a new threat and deepening the bonds between the characters, while Shaggy and Scooby learn to navigate an unfamiliar world with newfound allies.