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 who arrives in the Valleys, in this period comedy drama set in 1963. And it's not just the locals who are shocked: Prem's regal wife Kamini isn't too happy with the situation either. Life in the village is centred around the pit, and the Coal Board's local manager Richard Sharpe is keen to welcome the new arrivals - but he also has a few skeletons in his closet. Meanwhile, the doctor strikes up some new friendships and starts to settle into life in the Valleys, but it won't be plain sailing...