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.