From publisher blurb:
A legend tells of a good captain gone pirate who sailed the Bottomless Sea and spit in the eye of any storm that tried to sink him. So great was his disrespect that the Lady of Waves and the Lord of Tides conspired to cast his vessel off the sea entirely. They summoned a great wave that washed him far inland and stranded the pirate captain upon a deep lake far from port or cove. Overcome with anger, the captain flailed about, damaging his own ship and doing what no storm on the Bottomless Sea could do - sink the vessel.
A deep and dark lake, far from the lands of light, is rumored to hold the sunken ship of a powerful pirate captain. If the legends are to be believed, it is filled with treasure. All you have to do is figure out how to get down to it.
Are your adventurers prepared for an underwater adventure?