A relaxed Will is installed as the new vicar, though is only just back at the vicarage when Geordie drops by requesting his help. Initially reluctant to be drawn in, Will is swayed when he learns that the matter concerns Adam, a profoundly deaf boy from a devout family, whose mother has recently died following a fall. Adam's father thinks his son was responsible and the truth needs uncovering to help the family heal. Will's own troubled past threatens to colour his view of the case - and Geordie realises his new friend has demons of his own.
Set against the backdrop of the real hamlet of Grantchester, the drama focuses upon the life of Sidney Chambers, a charismatic, charming clergyman who turns investigative vicar when one of his parishioners dies in suspicious circumstances.
Grantchester - Series 4, Episode 4 Synopsis and Schedule