A dog-shaped lucky charm named Haruo lives in a child's room at the Amanogawa household in the town of Shichifukujin. Haruo and his friends, ENGIMON, are always watching over the siblings Yamato and Himi. One day, Himi gets lost after chasing a cat ENGIMON. Yamato is surprised to see Haruo moving and talking, but they work together to go and rescue Himi. Together with their ENGIMON, will they be able to find her?