A curse placed on Lum as an infant manifests itself in the present day, causing her to be taken to another dimension. Lum's husband, Ataru Moroboshi is turned into a hippo, and attempts to find Lum with the help of her friends.
Mendou invites Ataru & Co. to his estate for a viewing of a large, aging cherry tree named "Tarozakura", which is to be featured in an independent film which happens to be financed by ...