Elizabeth Vargas explores the mysterious disappearance of Hannah Upp, a 32-year-old teacher from Oregon, who vanished in the U.S. Virgin Islands in 2017 in the chaotic days between two category five hurricanes. While many questions remain about what might have happened to Hannah, her family and friends have reason to believe that she may be lost with no idea who she is, wandering in what doctors call a "fugue" state--a rare form of temporary amnesia. Vargas will help retrace Hannah's last known steps by sifting through clues from her past as well as speaking with Hannah's mother, friends and law enforcement who are still actively searching for her.