Will is preparing to be installed as the new vicar of Grantchester and Mrs C is anxious about his relaxed attitude. But that's just Will's nature – as he tells the Archdeacon, he's never been more sure of anything. The clock is ticking for Will to uncover the truth and help the family heal, but his own troubled past threatens to colour his view of the case – and Geordie realises his new friend has demons of his own.