The Miller and the Carpenter have words on the trip, so when the Miller's turn comes to tell his tale, his main character is a carpenter. The Miller makes the carpenter rather dumb and gullible in the story to get at the Carpenter on the pilgrimmage. In the story, the main humor is that the carpenter is being made a fool of by his own wife and her lover. In order to get some alone time, the wife and her lover tell the carpenter that there will be a flood and that they must sleep in huge tubs secured to the roof so that when the flood comes, they can simply cut themselves loose and float safely away. The carpenter climbs into his tub and quickly goes to sleep. His wife and her lover run back to the bedroom for some alone time. However, it is complicated by the fact that Allison (the wife) is also pursued by another man. He serenade her at the window and begs for a kiss. She tells him to close his eyes, and Allison's lover allows the serenading fool to kiss his backside through Allison's window.
The whole story is full of deception, jealousy, lust, and lack of marital loyalty. It is not a nice story, but amusing due to the idiocy involved.