The party is now on board a ship headed back Ruli Island.
Another cut-scene. There is an Upgrade shop, Weapon shop, Identify shop and Trade shop on the ship.
After talking to General Asthar, Therius, and your party, and go below deck.
Note, you can buy shark fins only at THIS location, below deck. Be sure to buy as many as you need as you cannot return here.
Follow Calista below deck to the right side near the cannons, which will lead to a cut-scene.
Talk to General Asthar to go back to Ruli Island, triggering a cutscene. Zael gets arrested. The party goes to jail and find Lowell, Syrenne, and Horace.
Moving on to Chapter 18