Following their previous expedition off the coast of Daedalus Island, Leo and his companion Zucco head to the Caribbean, drawn by the promise of new discoveries beneath warm tropical waters. The coral reefs teem with life — dolphins to swim alongside, great white sharks to navigate around — while the real prizes lie deeper. Sunken pirate ships rest on the seafloor, untouched for hundreds of years, their holds still guarded by ancient booby traps laid by hands long turned to dust.