As all of Edo flocks to see the work of the revered painter Hokusai, his daughter O-Ei toils diligently, creating the paintings sold under her father's name. Shy in public, in the studio O-Ei is brash and uninhibited. Seeking to come into her own as an artist, O-Ei sets out into the bustling city of Edo (present-day Tokyo), where she encounters spirits, dragons, con men, and traders.