In the deep blue ocean lives an ancient predator… Dr. Grace Mann knows great white sharks. As the daughter of an obsessed shark researcher based at the Farallon Islands, Grace spent her childhood in the company of these elegant and massive creatures. When a photo of her freediving with a great white goes viral, the institute where she works seeks to capitalize on her new-found fame by producing a documentary about her work. Underwater filmmaker Alec Galloway admires Dr. Mann and jumps at the opportunity to create a film showcasing the pretty biologist. As he heads to Guadalupe Island in Baja California Sur for a three-week expedition, it’s clear that his fan-boy crush on Grace is turning into something more serious. But even more pressing—Grace’s passionate focus on the sharks just might get her killed.