The narrator runs into Fortunato at a party and he is happy to see him so that he can get his revenge on Fortunato.
The narrator leads Fortunato to his home to look at the amontillado.
The narrator leads Fortunato down the stairs to the vaults.
The narrator gets Fortunato to drink more wine.
The narrator takes Fortunato into the recess.
Fortunato is confused because the Amontillado is not in the recess and the narrator takes it as his chance, and chains Fortunato to the wall. The narrator builds a wall to keep Fortunato closed off in the dark. Fortunato eventually dies.