When Eden Wallace finds paperwork in her late husband's effects indicating that he reserved a week at a dark sky park, she goes. She's ready to shed her fear and return to the living, even if it means facing her paralyzing phobia of the dark. But 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. Horrified that her getaway has been taken over, Eden decides to head home the next day. But then a scream wakes the house in the middle of the night. One of the friends has been murdered. Now everyone --- including Eden --- is a suspect. Everyone is keeping secrets, but only one is a murderer.