It’s 1973 and Martha has been sent down from Cambridge for distributing left-wing leaflets and doing no work. To escape parental disapproval, she marries her friend Kit, posted to Moscow by the diplomatic service. Kit is gay, so having a wife could keep him safe. In Moscow, Martha struggles to make sense of a difficult but fascinating new world. Who can she trust? Who can she even talk to? She takes Russian lessons, makes the wrong friends, becomes familiar with a strange and wonderful city, and unwittingly becomes a spy.