At a U.S. military training complex in Arizona, Staff Sergeant Tony "J" Jimenez leads an elite patrol unit through a mock village designed to simulate combat conditions. His best friend and fellow Staff Sergeant, Alex "Hutch" Hutchinson, serves as his right hand. Where Tony excels at leadership and tactical decision-making, Hutch is the superior soldier in pure execution.

Staff Sergeant Tony "J" Jimenez and his best friend Hutch drive from Phoenix to Long Beach to visit Tony’s brother, Michael. They arrive at Michael's house to find a surprise barbecue waiting. Tony reconnects with childhood friends including JoeJoe, Vic, and Memo, spending the afternoon in easy camaraderie before most guests depart as evening settles in.

After a few hours on the road, the group stops at a small, local tavern near a mountain town to grab lunch, and discover there’s poor cell service in the area. The group meets and befriends three young women—Chelsey, Veronica, and Jackie. The groups naturally blend together. Chelsey invites them all to visit the cabin later for drinks and games. They are interrupted by breaking news on the bar’s TV and everything is about to change.

Uncle Wade Calloway is on his way to his peaceful cabin, where he is planning to meet his niece and her friends for their annual spring break getaway. Delayed by a horrible traffic jam, Wade soon realizes the situation is much worse than he previously thought.

The group exits the tavern and is immediately overcome by the danger outside. The girls are confronted with a decision to go their own way or to stick with the men. The group decides to go to the nearby campground in search of Michael’s friends.

The group arrives at the Mountain Campground and begins their search for Michael’s friends.