Seven celebrities of differing faiths and beliefs experience an emotional journey on a pilgrimage in north Wales, a route linked by churches dedicated to early Celtic Christian saints.

The pilgrims head into Eryri National Park as the pilgrim path leads the group to one of Wales’ most famous natural wonders, Aber Falls.

The pilgrims' final destination is Bardsey Island, the fabled ‘Island of 20,000 Saints’. Along the way, they see spectacular landscapes, visit holy sites and engage in fasting, ritual and meditation.