Kotani Zenzaemon, a ronin who has a side job making brushes in a tenement house in the back alley, is watching Omine, who lives with him, from Kichizo, a resident of the same tenement house and a boatman. is asked to Kichizo and Mine have eloped and got married, but she feels empty in her boring daily life, and she wants to take a break by crossing the bridge over the river. On the other hand, Kichizo forbids him from crossing the bridge, fearing that his whereabouts will be known to others. Zenzaemon superimposes the appearance of these two people on the appearance of his former self and his wife, whom he killed himself.