A weekend camping trip starts out happily enough for a group of New Mexico college kids—a beautiful mountain lake, laughter, tall pines, frisbee and sunshine. But a shadow falls across the idyllic setting in the form of two outsiders invited at the last minute. There is a troubled kid brother: a silent, wounded boy immersed in his religious studies; and a much older cousin: a reckless but dangerously charming man who arrives with a wretched animal in tow. The dynamics among the campers grow steadily more complex and unstable, ultimately coalescing into a powerful undertow of manipulation and cruelty that threatens to drag the weekend to nightmarish depths…