Meet the Rev Adam Smallbone. He is a Church of England vicar, newly promoted from a sleepy rural parish to the inner-city world of St Saviour's in east London. It is a world he has little experience of, and it shows.
It is an incredibly difficult job being a good, modern, city vicar. Equally, it is a very hard job being married to one. Alex, Adam's long-suffering wife, does her best to support him, but she has her own career as a solicitor to worry about. Plus she is no one's idea of a conventional vicar's wife.
Every day throws up a moral conflict. All are welcome at St Saviour's and Adam can't turn any of them away, even if they are clearly lying or just plain annoying.
Tired of feeling excluded and derided by the rest of society, Adam is thrilled to meet Leon who is keen to get married at St Saviour's. Leon sees past the dog collar and a friendship develops, with the pair sharing pints in the local pub and even jogging together. But the bromance comes to a crashing halt at an embarrassing vicarage dinner party when Adam discovers that his wife, Alex, went to college with Leon - and that they had done something naughty in a rather surprising place.