Twenty years to the day after insisting aliens abducted his girlfriend, the number one suspect in her disappearance vanishes in the same spot outside Roswell, New Mexico. It's up to an unlikely duo - Oliver, a disgraced and jaded FBI agent, and Amity, a rookie on the Roswell Police Department and the missing man's niece - to follow the clues left behind in his journals and solve both missing persons cases. The closer Oliver and Amity get to the truth, a much more earthbound question arises: where do you turn when the love of your life does the unthinkable?