Mirna's heirloom

Though her family has nothing to offer as a reward, Mirna tells the characters that she might know where a valuable heirloom is hidden. When she was a young girl, she and her family fled from the town of Thundertree after undead overran the place. Her family had an herb and alchemy shop, inside which a case containing an emerald necklace was hidden beneath a section of storage shelves. She never dared to return and retrieve it. The shop was in the southeast part of Thundertree.