Out on sea, out of food like usual, the group is robbed and the run into a pirate that wants the gold belonging to the Great Gold Pirate Woonan, a young boy that wants to join Woonans crew and the boys oden making grandfather. Now they have to keep the other pirates from stealing the gold and help the boy and grandfather.
It was a good enough movie, but I question whether or not it was worth making a movie out of it. Two or three episodes would have been good enough. It didn’t seem to be much different than the show itself. Although at this point I’ve only watched 17 episodes or something.
Anyway, it’s pretty much exactly like the episodes of the main series. If you like them, you’ll probably like this. As for time frame, shortly after Usopp joins them.