Twelve-year-old Cooper believes that his grandfather -- who is living in a locked Alzheimer's ward -- is actually D. B. Cooper, the famous (real) skyjacker who secured a small fortune and vanished in 1971. Cooper sets out to prove his grandfather's true identity and uncover one of the biggest secrets in modern history. What begins as a distraction for a mystery-loving kid becomes a way of proving himself at school and maybe even trying to fix the deepening conflict in his parents' relationship as they all try to cope with the emotional and financial strain of caring for an aging relative. With his furry partner, Dana Scully, at his side, can Cooper uncover the truth? And what else will he find if he does?