Two sisters and their best friend go on a hiking getaway at the Grand Canyon, but tensions from their shared past flare up as someone appears to be stalking them.

Sisters Imogen and Beck have been friends with Tilda since high school. Once inseparable, over two decades the women have grown apart. After Imogen survives a traumatic attack, Beck suggests they all reunite to hike deep into the Grand Canyon's backcountry: a week away, secluded in nature. As the terrain grows tougher, tensions from their shared past bubble up. And when supplies begin to disappear, it becomes clear secrets aren't the only thing they're being stalked by..... -- adapted from jacket