The prisoner's wife entrusts her dowry to you so you can bring it back to the Town Boss. She will follow as soon as possible.
This would normally just involve talking to a few NPCs if it wasn't for a Pirate who's either supremely confident or suicidally inclined to think he can get away with threatening you on your own ship. Talk to him (he will be a level 5 Lieutenant-rank NPC), then defeat him and his one henchman. You will have one of your crewmen to help you.
After this, talk to the Town Boss and then again to the prisoner to claim your reward.
- Defeat the Bloody Arms Lieutenant
- Defeat All Henchmen