PI Madeline Maclin reluctantly agrees to help her ex-husband Bill find his children's nanny, Nadia Conrad. But while exploring in Carson's Cave, Madeline and her husband Jerry Fairweather find Nadia's body. Secrets and suspects abound from Bill, trying to cover up his affair with Nadia, to Nadia's former high school friends, all of whom witnessed a classmate's fatal accident in the same cave years ago, to Rodman Fogarty, a self-proclaimed expert on UFOs, who arrives in Celosia to investigate rumors of aliens landing in Carson's Crater and who has ties to Jerry's con man past. It's up to Madeline to uncover secrets that have been buried for way too long.