The first scene in the first act of the work by Boïto and Verdi shows Falstaff in a room of the Garter Inn. He is accompanied by those two good-for-nothings in his service, Bardolph and Pistol, ragged blackguards, whom he treats with a disdain measured by their own low standards. Dr. Cajus enters. He comes to complain that Falstaff has beaten his servants; also that Bardolph and Pistol made him drunk and then robbed him. Falstaff laughs and browbeats him out of countenance. He departs in anger.
Falstaff has written two love letters and despatched them to two married belles of Windsor—Mistress Alice Ford and Mistress Meg Page, asking each one for a rendezvous.
The scene changes to the garden of Ford's house, and we are in presence of the "merry wives"—Alice Ford, Meg Page, and Mistress Quickly. With them is Anne Ford, Mistress Ford's daughter. Besides the garden there is seen part of the Ford house and the public road. In company with Dame Quickly, Meg has come to pay a visit to Alice Ford, to show her a letter which she has just received from Falstaff. Alice matches her with one she also has received from him. The four merry women then read the two letters, which, save for the change of address, are exactly alike. The women are half amused, half annoyed, at the pretensions of the fat knight. They plan to avenge themselves upon him. Meanwhile Ford goes walking before his house in company with Cajus, young Fenton (who is in love with Anne), Bardolph, and Pistol. The last two worthies have betrayed their master. From them Ford has learned that Falstaff is after his wife. He too meditates revenge, and goes off with the others, except Fenton, who lingers, kisses Anne through the rail fence of the garden, and sings a love duet with her. The men return. Fenton rejoins them. Anne runs back to her mother, and the four women are seen up-stage, concocting their conspiracy of revenge.
The second act reverts to the Garter Inn, where Falstaff is still at table. Dame Quickly comes with a message from Alice to agree to the rendezvous he has asked for. It is at the Ford house between two and three o'clock, it being Ford's custom to absent himself at that time. Falstaff is pompously delighted. He promises to be prompt.
Hardly has Dame Quickly left, when Ford arrives. He introduces himself to Falstaff under an assumed name, presents the knight with a purse of silver as a bait, then tells him that he is in love with Mistress Ford, whose chastity he cannot conquer, and begs Falstaff to lay siege to her and so make the way easier for him. Falstaff gleefully tells him that he has a rendezvous with her that very afternoon. This is just what Ford wanted to know.
The next scene takes place in Ford's house, where the four women get ready to give Falstaff the reception he merits. One learns here, quite casually from talk between Mistress Ford and Anne, that Ford wants to marry off the girl to the aged pedant Cajus, while she, of course, will marry none but Fenton, with whom she is in love. Her mother promises to aid her plans.
Falstaff's arrival is announced. Dame Quickly, Meg, and Anne leave Mistress Ford with him, but conceal themselves in readiness to come in response to the first signal. They are needed sooner than expected. Ford is heard approaching. Quick! The fat lover must be concealed. This is accomplished by getting him behind a screen. Ford enters with his followers, hoping to surprise the rake. With them he begins a search of the rooms. While they are off exploring another part of the house the women hurry Falstaff into a big wash basket, pile the soiled clothes over him, and fasten it down. Scarcely has this been done when Ford comes back, thinking of the screen. Just then he hears the sound of kissing behind this piece of furniture. No longer any doubt! Falstaff is hidden there with his wife. He knocks down the screen—and finds behind it Anne and Fenton, who have used to their own purpose the diversion of attention from them by the hunt for Falstaff. Ford, more furious than ever, rushes out. His wife and her friends call in the servants, who lift the basket and empty it out of the window into the Thames, which flows below. When Ford comes back, his wife leads him to the window and shows him Falstaff striking out clumsily for the shore, a butt of ridicule for all who see him.
In the third act Dame Quickly is once more seen approaching Falstaff, who is seated on a bench outside the Garter Inn. In behalf of Mistress Ford, she offers him another rendezvous. Falstaff wants to hear no more, but Dame Quickly makes so many good excuses for her friend that he decides to meet Mistress Ford at the time and place asked for by her—midnight, at Herne's oak in Windsor forest, Falstaff to appear in the disguise of the black huntsman, who, according to legend, hung himself from the oak, with the result that the spot is haunted by witches and sprites.
Falstaff, in the forest at midnight, is surrounded by the merry women, the whole Ford entourage, and about a hundred others, all disguised and masked. They unite in mystifying, taunting, and belabouring him, until at last he realizes whom he has to deal with. And as it is necessary for everything to end in a wedding, it is then that Mistress Ford persuades her husband to abandon his plan to take the pedantic Dr. Cajus for son-in-law and give his daughter Anne to Fenton.
Even taking into account "Otello," the general form of the music in "Falstaff" is an innovation for Verdi. All the scenes are connected without break in continuity, as in the Wagnerian music-drama, but applied to an entirely different style of music from Wagner's. "It required all the genius and dramatic experience of a Verdi, who had drama in his blood, to succeed in a lyrical adventure like 'Falstaff,' the whole score of which displays amazing youthfulness, dash, and spirit, coupled with extraordinary grace." On the other hand, as regards inspiration pure and simple, it has been said that there is not found in "Falstaff" the freshness of imagination or the abundance of ideas of the earlier Verdi, and that one looks in vain for one of those motifs di prima intenzione, like the romance of Germont in "La Traviata," the song of the Duke in "Rigoletto," or the "Miserere" in "Il Trovatore," and so many others that might be named. The same writer, however, credits the score with remarkable purity of form and with a sveltesse and lightness that are astonishing in the always lively attraction of the musical discourse, to say nothing of a "charming orchestration, well put together, likeable and full of coquetry, in which are found all the brilliancy and facility of the Rossini method."