Montresor sees his friend Fortunato in the streets during Carnival and greets him. He tells him of the Amontillado he'd just purchased without his judgement because he was no where to be found.
Montresor says if he's busy he can just go and get Luchesi to inspect it. Fortunato insists that he be the one to check out the Amontillado instead of Luchesi because he is the better wine connoisseur.
Montresor warns Fortunato of the amount of niter before he continues to go farther into the vaults.
Montresor offers Fortunato a glass of Medoc, even though he's already intoxicated, so he is less aware of what's happening. Fortunato asks him if he's a part of the Masons and he lies and says yes to gain his trust.
While he is distracted and looking for the Amontillado, Montresor chains up Fortunato and starts to gather his materials from under a pile of bones for the wall. He builds the wall layer by layer but stops to enjoy the sound of Fortunato's suffering.
Montresor calls out for Fortunato but he doesn't answer. He forces the last stone into place and puts the bones back into place. He brags that for half a century no mortal has disturbed them. In pace requiescat! (may he rest in peace)