Sebastian (Chris Carmack) & Dani (Laura Vandervoort) are dive instructors in Honolulu. They are hired by Carlton (David Anders) & Azra (Marsha Thomason) to search the North Reef for treasure from the Spanish ship San Cristobal. It becomes apparent that treasure isn't really the goal when a metal crate is found, and Carlton explains it's for a rich client and there's one more crate to find. Sebastian & Dani are suspicious and realize they're in trouble when they open up the crate and see what's inside.