"I learn in this letter that Don Pedro of Arragon comes this night to Messina" (I.i.1)
"That young start-up hath all the glory of my overthrow: if I can cross him any way, I bless myself every way. You are both sure, and will assist me?" (I.iii.11)
"If I see any thing to-night why I should not marry her to-morrow in the congregation, where I should wed, there will I shame her." (III.ii.37)
Don Pedro, Don John, Claudio, Benedick, Balthasa, and their men are all welcomed by Leonato, the governor of Messina, and have been invited to stay for a month at his home, and will be throwing a diner and a masquerade ball of shorts. At this ball Claudio and Don Pedro plan to trade places so that Don Pedro can woo Hero-Claudio's love interest- and win her and her father over, then Don Pedro will Switch with Claudio and he can have the girl he wants and loves.
"But fare thee well, most foul, most fair, farewell Thou pure impiety and impious purity. For thee I’ll lock up all the gates of love," (IV.i.50)
Don John, Conrade, and Borachio make plans to spoil his brother -Don Pedro- and Claudio's plan to win over Hero. They plan to do this by telling Claudio that instead of wooing Hero for Claudio, Don Pedro is wooing her for himself, not for his friend.
"Done to death by slanderous tongues Was the Hero that here lies. Death, in guerdon of her wrongs, Gives her fame which never dies. So the life that died with shame Lives in death with glorious fame.." (V.iii.71)
After failing to foil Don Pedro and Claudio's plan to woo Hero, Don John and Borachio scheme up a plan so that the night f Hero's wedding she will sleep in another room and Margaret, Borachio's lover, will come to the window and welcome Borachio in. Don John will bring Don Pedro and Claudio over to under Hero's window and they will see what looks like Hero, welcoming in a man into her room the night before she will get married.
"No, that you shall not till you take her hand Before this friar and swear to marry her." (V.iv.73)
Hero, excited and happy to be marrying her love, Claudio, and is shocked and saddened enough to faint when Claudio accuses her in front of everyone of being unfaithful and then refuses to marry her for it, then her father goes on to ask why he had to have a child like Hero, or a child at all, if it would lead to family shame. When Hero awakens, Friar Francis comes up with the plan to say hero is dead and make Claudio regret what he has done and the person who has caused all of this will come forward and reveal himself, and then the family name will also be cleared. Beatrice asks Benedick to kill Claudio to prove his love to her.
Hero goes along with the plan and pretends to die, and after shaming Hero's name at the alter, Claudio is stricken with grief after Borachio explains Don John's plan to both Don Pedro and Claudio. He mourns publicly to clear Hero's name, under Leonato's suggestion. Benedick no longer needs to kill his friend, Claudio for breaking Hero's heart to show his love for Hero's cousin, Beatrice.
To still be able to marry into Leonato's family, Leonato has arranged for Claudio to marry his brother's daughter, his mysterious niece, and Claudio agrees to it. Though when he asks to see her soon to be wife's face he is denied, and when he is married, he is pleasantly surprised to find that it is in fact Hero! Benedick and Beactrice declare their love for each other, under their friends watchful eyes of truth.
"Why, then she’s mine.—Sweet, let me see your face." (V.iv.73)