Lovesick Nemorino tries to get Adina’s attention, at least, if never her love. With the situation complicated by the handsome and self-satisfied Belcore, Nemorino buys a love potion from the traveling Doctor Dulcamara. Using his last coin. When a second dose is indicated, he enlists with Sergeant Belcore in order to get money for it. Since it is only wine, the consequence is inebriation.
Something in all this brings Adina to reflect that she really does love Nemorino. All ends well, except perhaps for Belcore. But as he says, the sea is full of fish.