Sisters Fatemeh and Shirin have been living together, in the same flat in Edinburgh, for 43 years. In this flat they cook, they read their coffee grains, they think about the fading memories of their childhood in Tehran and they listen to the radio. Although they live side by side, they never talk to one another. When a global pandemic hits and the sisters are locked in their flat, they are forced to reckon with their memories of a betrayal that changed the course of their relationship. Sister Radio is a vibrant yet nostalgic play reflecting on both migration and family as well as being a celebration of culture from two very different places.