Since her husband died, Eden Wallace doesn't work, has given up on her love of photography, and is so plagued by night terrors that she can't sleep without the lights on. When she finds paperwork in her husband's effects indicating that he reserved a week at a dark sky park, she goes, even if it means facing her paralyzing phobia of the dark. When she arrives at the park, the guest suite she thought was a private retreat is teeming with a group of twenty-somethings, all stuck in the orbit of their old college friendships. When one of the group is murdered, everyone--including Eden--is a suspect.