On the 9th of July 1857, a twenty-five-year-old labourer named Angus MacPhee bludgeoned to death his parents and aunt in the crofting community on the remote Hebridean island of Benbecula.

Five years later, Angus's older brother Malcolm recounts the events leading up to the murders while trying to keep a grip on his own sanity. Malcolm is ostracised by the community and haunted by this gruesome episode in his past, but is he as innocent as he seems?