In 1965, a research vessel makes an incredible discovery in the South Pacific: an ancient pyramid complex. A year later, while exploring the ruins of the necropolis, grieving archaeologist William Kirk encounters a mysterious woman he believes may be the last living sea nymph. Though initially convinced he is hallucinating, it is soon revealed that not only is the entity very real, but is guarding a secret with the power to change the world forever...or destroy it.
And Kirk must decide how far he will go--and what he is willing to sacrifice--to protect her.