After the attack on Father Barnes while Halliwell was in custody, Dalgliesh brings Swayne and Lampart in for questioning. Meanwhile, Miskin tracks down nurse Theresa, who used to work at Campden Hill House and now works at Lampart's clinic.

In May 1975, eight-year-old Darren and churchwarden Miss Wharton find two dead bodies in the vestry of St Matthew's Church, Paddington, their throats slashed. One is Sir Paul Berowne, a baronet and recently resigned Tory MP, the other a homeless man called Harry Mack. Dalgliesh is called in to investigate, accompanied by cocky DS Masterson and his new DS Kate Miskin.

The cast and crew discuss the making of Dalgliesh.

Wilfred announces that he will transfer the Grange to the Ridgewell Trust and hold a vote on whether he will carry on as spiritual adviser and, despite Eric and Helen's plot to usurp Wilfred, the majority of the Grange vote for him to stay, ensuring the Lourdes trips will continue. Grace's post mortem deems her death to be non-suspicious and Dalgliesh struggles to gather enough evidence to charge Wilfred.

The timeline moves on to March 1975, and Dalgliesh is invited to Dorset by his old friend Father Michael - only to discover that he died a few days ago. Father Michael lived in a home for the disabled run by the enigmatic Wilfred, who has organised trips to Lourdes ever since he was miraculously cured there of a serious illness. When Dalgliesh learns that provocative resident Victor recently wheeled himself off a cliff in an apparent suicide, he wonders if his death might be connected to Father Michael's.

After Fallon's death, Dalgliesh finds a library book in Fallon's room and a letter in Pearce's pigeonhole about a patient of Courtney-Briggs' called Martin Dettinger.

Student nurse Heather Pearce dies during a training demonstration. Detective Chief Inspector Adam Dalgliesh is sent to investigate, accompanied by his partner DS Masterson.