Ava is hoping for a peaceful getaway with friends in the resort town of Cabo, Mexico. But when the plane crashes in the Pacific Ocean and comes to rest on the edge of an underwater ravine, Ava and a handful of survivors, including a former army nurse, Mardy, and her granddaughter, Rosa, are trapped in the airlocked cabin. Against the odds, Ava must fend for herself, contend with bloodthirsty sharks, and find the courage to step up and lead the crash survivors to safety.