Yokai are Japanese spirits, and young Hamachi is fascinated by them. Now he continues his quest deep into the Yokai realm in the hopes of finding Madkap, the kappa (water spirit) he believes has killed his grandmother. Armed with nothing but a sacred rope and a lucky kappa's foot, Hamachi has made two friends to help him on his journey: Lumi the talking lantern and, newly awakened, the umbrella that once belonged to this grandfather!...