A team of adventurers, led by Johnny and his new bride Theresa, sets out on an ambitious mission to locate a sunken treasure off the coast of Cuba. They enlist the help of Dominic, a seasoned diver with extensive knowledge of underwater exploration. As they embark on their journey, they face numerous challenges, including dangerous underwater terrain, the mechanical failure of their equipment, and rival salvagers who are also intent on finding the treasure. The group must navigate these obstacles while coping with their personal dynamics and growing tensions.

As they delve deeper into the ocean, the team's quest for the ancient treasure takes a perilous turn with each dive revealing new hazards and mysteries. Personal rivalries and hidden motives exacerbate the already high-stakes situation, leading to conflicts among the treasure hunters. With time running out and threats mounting from both nature and human adversaries, the team's unity and perseverance are put to the ultimate test. Their underwater adventure evolves into a desperate struggle for survival, testing their loyalty and determination against seemingly insurmountable odds.