When they take some friends on an extreme sport adventure, the last thing Jared and Sam expect to see below the shark-infested waters is a legendary pirate ship rumored to contain millions of dollars in gold. But their good fortune is short-lived, as a ruthless gang of criminals gets word of what they have uncovered.

When they're hired to recover the lost treasure of Columbus, married scuba divers Sebastian and Dani think they've hit the jackpot. But as they get closer to the fortune, the couple begins to suspect their employers have their own agenda. Hitting upon the real plan, the two come to the chilling realization that they may be expendable and that there's much more than riches at stake.