Deva, a Brazilian nightclub singer, accepts a mysterious invitation to become the companion to a wealthy recluse living in a London penthouse. Known only as Harry , he suffers from a traumatic brain injury where he rises each morning, having forgotten all that has transpired the day before. One cryptic clue offers a glimpse into Harry 's past— a photograph of a man in a field, picking a daffodil. Endeavoring to identify the man, Deva discovers that her own turbulent past intertwines not only with Harry’ s but with the unnamed man in the photograph, and that all of their movements are being monitored, even orchestrated, by the doctor and housekeeper in Harry’ s employ, who have ties to British intelligence and a dark purpose of their own. Harry’ s past memories are the key— but remembering the past might just destroy them all.