Separately and collectively, The party had fallen into the hands of pirate slavers.
Waking up in the belly of a galley ship, chained to bunks, and in the midst of a great storm.
The ship was grounded and in the crash, split apart. The rear stayed wedged in the rocks near a beach cove, the front half floated off with the storm.
As Klembsy, the human druid, pushed on the bunk post his chains were attached to he was somewhat surprised to find that it gave quite easily. Feeling under the water, near the floor base, the post appeared to have split in the crash. Klembsy was able to loop his chains off the post, grab the keys, remove his shackles, and release the other prisoners.