Christmas is coming to Norbridge, but so is The Chorister, a killer with a liking for brutal quotes from the Psalms of David. When a body is discovered with smashed teeth, the harmony of the ancient Cumbrian market town is threatened and members of the Abbey Chorus start to panic. Suzy Spencer, single mum and media producer, and Robert Clark, teacher and traditionalist, find themselves drawn in to help their friends. But they already have enough troubles of their own, coping with teenagers and the trials of sharing a home - all made worse by the musical menace of The Chorister at the Abbey.