No one knew what finally prompted a shy young schoolboy to walk out of Warren Hall School never to return. The discovery of some of Stephen Willett's bloodstained clothing in an overgrown ditch throws suspicion on Wally Price, a local odd-job man, and his suicide is seen as an admission of guilt.

Over fifty years later another tragedy strikes Warren Hall when the body of a stranger is discovered in the school grounds. The local postmaster is charged with murder and solicitor Rosa Epton is summoned from London to advise him on his defence.

Then a second murder at the school - and the discovery of some damning evidence against her client - makes Rosa determined to investigate leads that the police have overlooked. So she embarks on the most challenging assignment of her career: one that involves long-held secrets and dangerous confrontations. For a killer stands between Rosa and the truth.