When a rogue cargo freighter strikes an oil tanker in the Detroit River, the oil spill is the worst marine disaster in years. Dirk Pitt's NUMA team lead the clean-up operation, with the help of new green tech firm, BioRem. But when one of NUMA's best divers dies suspiciously while working on the wreck, Pitt fears there's more to BioRem than simply saving the environment. The brand-new action-packed adventure in the Dirk Pitt series.