An psychological thriller about a woman named Trina (Driver) and the quest for her deceased grandmother's lost diamonds. With her friend Frank (Wilson) in tow, she begins the search in the harsh Mexican desert. They encounter a pair of escaped convicts (Spader and Brolin) whom, coincidentally, have already found the jewels and are looking for a ride over the border. Once the convicts learn of Trina's quest, and she discovers they've found the diamonds, a strategic battle of strength and wit commences, and only one of them will make it out of the desert alive.