Jesse Bullington

Even disaster can yield riches for the right sort of criminal... The great flood killed thousands overnight - turning the towns between the warring cities of Dordrecht and Geertruidenburg into a desolate inland sea. Into this ruined land sail three uneasy conspirators: a ruthless conman, a thug at the edge of madness and a half-feral girl who swims like a fish. Working together they could find fortune beyond reckoning beneath the waves, but the lost souls below will not give up their treasures so easily.
And even if these three can survive the dark waters, that's no guarantee they will survive each other.