A group of local businessmen have come to us looking for help, so maybe I could get you to lend me a hand? A group of pirates on the hunt for big game have arrived in the area. When we noticed that the trade ship had been attacked right after leaving port, the scum were already making their escape. Go and talk to the market keeper for more details.
Alright, with you it can be done! Please, teahc those scum a lesson. The ship's cargo was mostly spices... I don't want to think about how much was lost. They were extremely skilled at seamanship, so they were high seas pirates used to rough waves. If the plan is to sell goods at the northern town, they're around Porto by now.
The trader ship that just left port saw a sneak attack by pirates, and all of its spices were stolen. The rogues are thought to sail offshore of Porto. Head north off Porto and search the north-eastern Atlantic.