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

When Sidney Chambers begins receiving sinister anonymous phone calls, he realises he is connected to a series of murders targeting respected figures in the community. Leonard bonds with Hilary as she cares for her dying father, while Geordie's investigation of the killings leads him to a mysterious home for people with disabilities.

When several villagers become ill at the local cricket match, Geordie and Sidney must determine if it was an accident, or something more sinister.

Sidney and Geordie struggle to determine the connection between a murder and a number of post office robberies.

When a young woman’s death is covered up, Sidney and Geordie try to hold those responsible accountable for their actions.

Sidney arrives at a Romany camp, but when someone is killed, he is prime suspect.

When a little boy is abducted, personal pressures on Sidney and Geordie come to a head.