Adrian Grunberg directs this action thriller in which a family must survive against a massive megalodon shark. Paul (Josh Lucas) takes his family out to Baja to see the oil rig he proudly worked on, taking a small boat to ferry them over. Arriving at the rig, he discovers it is all but deserted, save for a worker named Chato (Julio Cesar Cedillo) and his pet chihuahua.
Paul soon learns that they are now stranded on the rig, as lurking in the waters beneath them is a legendary megalodon, named by locals as the Black Demon. If he is to get his family home safely, Paul and Chato must work together to find a way to put an end to the terrifying Black Demon.