Getting the QuestEdit
Scarlett has only to speak to Yngvar. He can be found at the South Shore. Initially, he is locked in a room of the Windmill Tavern with the other prisoners. After that, he can either be found in the Tavern barroom or down below on the beach just north of the Tavern bluff.
Fulfilling the QuestEdit
The implication is that Scarlett might as well help herself to the stolen loot.
All Scarlett needs to do is return to the Windmill Tavern, walk up the stairs and along the balcony to the protruding stones in the wall, and press them in the right order. Yngvar even helpfully provides the combination (which is recorded in the quest logbook, 1-3-2-4, with the stones numbered left to right, if you need to refer to it). Then she can go back downstairs, enter the room, and help herself. (Note the
Loot is the is in 2 chests in the innkeepers room, as well as a bed to rest in. No change to Reputation.