In 1912 Fred Fairly is a Junior Fellow at the college of St Angelicus in Cambridge, where for centuries no female has been allowed to set foot. He lectures in physics and the questionable nature of matter, and worries about the universal problem known in Cambridge at the time as ‘the absurdity of the Mind-Body relationship’. To Fred this is tormenting rather than absurd. The young woman beside him when he wakes up one evening in the Wrayburns’ spare bedroom might help to resolve it, but how can he tell if she is quite what she seems? Fred is a scientist. To him the truth should be everything, and indeed he thinks it is. But scientists make mistakes.