Episode 1
Seven celebrities of differing faiths and beliefs set out in search of St Columba, an Irish monk born 1,500 years ago who helped spread Christianity from Ireland to Scotland.
Episode 2
Life on the pilgrimage gets tough as the celebrities are challenged both physically and spiritually, struggling with lack of sleep and difficult questions about faith.
Episode 3
With the end of their pilgrimage looming, the celebrities get a taste of monastic life in a medieval abbey, but will it help them discover more about the pathway to faith?