When his father's warnings about an impending alien invasion are ridiculed, twelve-year-old Linn Youki finds himself drawn into an intergalactic adventure after encountering Takoro, a peculiar 'deputy sheriff' tracking down notorious space criminals. Together, they confront the Kurodako Brothers, who aim to dominate Earth using their shape-shifting abilities and advanced technology. Transforming into the heroic Muteking with Takoro's assistance, Linn thwarts the villains' plans in a whimsical tale filled with action, humor, and a quirky ensemble including a roller-skating hero, an alien sidekick, clumsy would-be conquerors, a captivating police chief, a determined scientist, a witty canine companion, and a haughty flying saucer. This delightful blend of comedy and drama promises to captivate audiences with its eccentric yet endearing characters.