The shogun's vassal Harima Aoyama and a chamber maid are in love with each other, but they cannot be together due to a difference of their status. Soon, an offer of marriage is brought to Harima. Trying to test his love, Okiku breaks one of the plates of the family treasure of the Aoyama family, but Harima doesn't notice. However, someone surrounding her witnesses the moment Okiku breaks the plate on purpose.