It is very good wine indeed. It's called Malvasia.
https://es.wikipedia.org/wiki/Malvas%C3%ADa_(uva)
There's a dry and sweet version, I prefer the sweet one. https://cellerdelhospital.cat/producte/malvasia-dolca/
They do ship internationally it seems, this one is the one from the story =)
The origin city of the grape variety, which came by ship to my city at the time, was monemvasia https://es.wikipedia.org/wiki/Monemvas%C3%ADa