Mia, a solitary freediver, is recruited by someone from her past to take the treacherous journey to Malpelo, a remote island in Colombia, in order to investigate the troubling disappearance of hammerhead sharks. To do so, she will have to reconcile with her past and navigate the dangerous waters of the pacific ocean, trapped on a boat with an all-male crew. They prove to be just as slippery as the predators she’s studying.