Inspector Archie Penrose invites crime writer Josephine Tey down to his family home in Cornwall so she can recover from a recent trauma. Josephine welcomes the opportunity, but her hopes of experiencing a period of rest are dashed when her arrival coincides with the mysterious death of a young man in the village.

Soon, more people are going missing or turning up dead, and Josphine and Archie begin to suspect the involvement a cold-blooded murderer. As Josephine and Archie try to unravel the mystery, they begin to see death as an angel with two faces - one gazing at the violence in the present, the other looking back to the crimes hidden in the past.