John is extremely jealous of the looks alisoun receives from other men because of her beauty, and if he were to know she had fallen for another man he would be angry.
Alisoun is in love with Nicholas but is terrified of her husband finding out. Nicholas tells her not to worry and that he has come up with a plan to trick John so they can be together.
Nicholas tells john of the flood that is to come and kill them all, he then tells him to get three large tubs and fill them with enough food and drink for a day, after he promises the floods with retreat. Nicholas tells him he cannot tell anyone of this and that if he doesn't then his wife and he will live
Absolon comes to Allisouns window thinking John is gone and confesses his love. When she tells him to go away he asks for a kiss and Allisoun sticks her but out the balcony and Absolon kisses it enthusiastically. He pulled back for he felt a beard and is scared of what he just did.
John cuts the ropes and falls from the rafters after hearing someone yell about water and breaks his arm
After all of this happens John is yelling about some flood so Alisoun and Nicholas tell everyone that he has gone crazy and he bought three tubs to escape the flood the crowd laughs and declares him crazy. Thus leaving John cuckolded, Absolon humiliated and Nicholas branded.