It's the end of yet another night at Hastings Supermarket, a grocery store in Buck Lake, Arizona. But just before closing, a group of masked and armed to the teeth militants invades the store and take everyone hostage

After being captured and tortured by the psychopath Otis, teen cheerleader Riley Lawson escapes and informs her parents, who quickly sidestep sluggish FBI agents and take matters into their own hands. But the Lawsons' revenge plan hits a snag when Otis's unusual brother enters the picture.