The seal on a youkai castle is taken off by Nezumi-otoko [Rat-man] and the youkai from the castle requests children from a village to be given to the castle once a month to turn them into youkai. Kitaro happens to be walking by and offers to help. Kitaro asks to borrow one girl to be bait for the bad youkai. Nezumi-otoko comes to get the girl which surprises Kitaro because they know each other. Nezumi-otoko is known to be greedy and not care for anyone other than himself and is only helping the youkai of the castle for fun. The girl gets taken from Kitaro. Kitaro gets in a series of fights with the Youkai of the castle. In the end he is flattened and his chanchanko [his magic vest] is taken by Nezumi-otoko. Kitaro channels his mind into the chanchanko and threatens to suffocate Nezumi-otoko remotely and makes him re-seal the castle. Kitaro becomes un-flattened with help from his father and saves the girl before morning.
