Drama series set in the 1950s. When Grantchester vicar Sidney Chambers is accused of a terrible crime, unmasking the real culprit sends shockwaves through the community.

Geordie and Cathy are on a mission to find Sidney a girlfriend – but nobody seems to be good enough for the choosy vicar. Geordie's plans are further thwarted when Sidney's old flame, Amanda Hopkins arrives in Grantchester while Guy is away on business.

After thoroughly modern Margaret’s visits to the vicarage start leaving Mrs Maguire’s nose out of joint, Sidney is hoping for a distraction – which arrives in the unexpected form of a young man sat alone in the church and covered in blood.

As the trial of local teen Gary Bell approaches, Sidney and Geordie find themselves at loggerheads regarding his guilt – not even building a go-kart together can get them to see eye to eye. Sidney's mind is taken off these matters when he finds the anxious Reggie Lawson at the graveside of his dead wife, Anna. Convinced that she still haunts his home and stable yards following her suicide he implores Sidney to come to his estate, Kingsbrook and perform an exorcism for him.

Amanda promotes a petition to stop the hanging of Gary Bell while Sidney has to solve the death of a wife beater in a locked cell after being arrested by Geordie who knows the beaten wife who had refused to make a complaint. Evidence of a false arrest and bruising on Geordie's hand and Margaret's statement raise doubts in Sidney's mind as to his innocence. Dead rats at the dead husband's house provide another solution. Sidney, present at Bell's hanging, is distraught and the attitude of Geordie to justice taking it's course.

When Sidney's old friend Reverend Sam Milburn visits the parish claiming to be seeking forgiveness for his crimes, the vicar is torn. Matters complicate further when Harding Redmond finds out he has returned and makes threats against his life, and Sam flees. With his friend now missing, Sidney fears the worst and must once again join forces with Geordie to investigate. Meanwhile, Leonard continues to wrestle with his feelings for Daniel Marlowe, and a visit from Mrs Maguire leads to Amanda having a heart-to-heart with Guy.