A man wakes up as a creature that knows exactly how the world ends, then has three days to decide what to do with that knowledge. The premise strips away every excuse: no power fantasy, no time to build a following, just a human consciousness trapped in a body that speaks prophecy and dies on a timer. Japanese folklore doesn't waste time on redemption arcs, it punishes you for existing in the wrong form, and this film stays loyal to that coldness.

A man who has trouble communicating with his son receives a box in the mail with a strange helmet inside. When he puts it on, he is transformed into a kudan, a creature from Japanese folklore with a human head and the body of a cow. According to legend, a kudan is born to a cow, speaks in a human voice, foretells major events such as war or disaster, and dies within three days. The film is a fantasy built on that old myth.