When war photographer Mark Simmons is sent to do a promo on Waverly Chasm, he assumes it’s a puff piece, a waste of his talents. Widow Marsha Lake brings her son, Lyle, to help him heal after his father’s death. Donald Adams, aka H.R. Chatmon, joins the tour to get away from a sticky situation. Justine McCarthy consents to the hike to placate her boyfriend, Trevor. For Jaleel Warner, the tour guide, walking the chasm is just part of his job. Each of these people must face their darkest memories in order to discover and defeat the secret buried in Waverly Chasm.