Ten years after nearly dying in her attempt to destroy the Black Demon, Dr. Bella González is ready to try again. With a state-of-the-art submersible, an improved chemical weapon, and the guidance of ageless herald Mateo, she sets out for the lair of the vengeful megalodon-a cavern deep beneath the surface of the Pacific. Will she be successful this time, or will the avatar of divine wrath teach her a lesson she'll never forget?