Simplify the following text for a Grade 6 native English-speaking person.
Original: When Montresor appears not to recognize the gesture , Fortunato asks , `` You are not of the masons ? '' Montresor says he is , and when Fortunato , disbelieving , requests a sign , Montresor displays a trowel he had been hiding .
Simplified: Montresor is telling the story 50 years after the death of Fortunato .