On the beach of the southern area of Goldshore, you will find a former sailot who is looking for his captain, who hasn’t been found after the shipwreck. You will find the captain in Victors Hollow and you will need either Ophilia or Primrose to complete the quest. The captain is the older-looking gentleman in front of the tavern, so use Guide/Allure on him to have him follow you back to Goldshore. Note that he is particularly tough to Guide/Allure, as Primrose success rate is relatively low and Ophilia would need to be level 40, so saving beforehand is a good idea. Once you bring the captain back to the sailor, you will complete this Side Story.