A story of two sisters, the older being more traditional, the younger a "moga" ("modern girl"). Their widowed father runs the family sake shop -- but is running into financial trouble (causing him to make some bad decisions). Meanwhile, his long-time mistress's little business is also on the rocks. Amidst this, the older sister is introduced to a well-off suitor (a university boy who is much more intrigued by the less traditional "little sister"). Add a dotty grandfather, an officious uncle and busy body neighbors.