Kum Kum, a spirited and kind-hearted boy from the prehistoric Mountain People tribe near Fire Mountain, thrives on curiosity and playful chaos. His days brim with antics alongside friends—loyal Aaron, spirited Mochi Mochi, and his quick-witted girlfriend, Chiru Chiru—often sparking trouble that earns sharp scoldings from his father, Paru Paru, the tribe’s formidable leader. Within his close-knit family, Kum Kum navigates the watchful care of his mother, Maru Maru; the teasing dynamic with his teenage sister, Furu Furu; and the occasional betrayal by his younger brother, Toru Toru, whose tattling sharpens Kum Kum’s knack for evasion.

The tribe’s survival hinges on hunting, farming, and enduring Fire Mountain’s harsh demands, with Kum Kum’s restless ingenuity both challenging and enlivening their routines. His clashes with Klopedia, the village elder, and Roman—Klopedia’s son and Furu Furu’s future husband—alternately invite wisdom or consequences, from stern lectures to confinement in the tribe’s wooden cave. Yet through every mishap, Kum Kum’s escapades weave humor into the fabric of prehistoric life, revealing the resilience and bonds that sustain his community amid ancient trials.