In a Steampunk alternate world, a maritime civilization built on the seas has been under attack from below. Giant ocean monsters have begun hitting shipping vessels, harbor infrastructure, and the people who depend on both. Ordinary predators follow the monsters to scavenge what the destruction leaves behind. Coastal settlements, out of options, post bounties on the creatures. Torel and Chris, underwater adventurers for hire, take the contracts. The hunt begins in the depths and does not end until every monster on the list is accounted for.