The sleepy Welsh mining village of Trefelin is in for a shock. When the local doctor dies, his replacement isn't quite what people expect - Prem Sharma is the Indian doctor.

Colliery manager Richard Sharpe is still desperate to find a mysterious green leather diary left behind by Prem's predecessor, Dr Elwyn.

Documentary telling the story of the immigrant doctors who arrived in Wales in the 1950s and 60s from the Indian subcontinent and worked at the front line of the Welsh health service throughout one of the most turbulent periods in its history. These doctors not only changed the face of the NHS but also the culture of the communities they came to serve. Complementing the new drama series The Indian Doctor, the programme reveals how these doctors came to Wales and, through their years of service, helped to change attitudes towards racism and immigration across Wales.

The Indian Doctor's wife, Kamini Sharma, is still desperate to leave the village of Trefelin. But as she tries to escape, she finds herself becoming the only person who can help local tearaway Dan when he gets into trouble.

The new doctor, Prem Sharma, comes up with a cunning plan to diagnose the miners' health problems.

The village of Trefelin is preparing for the annual summer fete, but there's a lot going on behind the scenes. Dr Sharma is preparing to leave the village for good, and Mrs Sharma goes in search of the missing Dan - but she finds more than she bargained for.

Sharpe has been promoted, and Megan pleads with Dr Sharma to stay and help the miners fight for justice. The series builds to a climax as the doctor takes on Sharpe once and for all...