Sebastian has a problem. He's in love with his best friend Peter and has been since their schooldays when they were outcasts together. His pining is so obvious that all of London knows, even his frustrated mother who just wants him to be happy. The only person who doesn't know is Peter. An abusive childhood with a controlling father left Peter emotionally detached and socially anxious and now he mostly hides himself away in his house where he designs the unique, fast cars that are status symbols among the town's elite. People would kill to own a single one of Peter's cars. Sebastian owns four. The meaning in that is obvious to everyone but Peter.
In a late Victorian England where cars exist, even though they aren't exactly comfortable, and computers allow the shy to avoid human contact , a progressive spirit has led to a begrudging acceptance of the sexuality of certain members of society. The sodomy laws have been repealed so that two men might spend the rest of their lives together, but that is no guarantee of happiness. Peter risks his neck driving at dangerous speeds for fun but sees passion as something to be frightened of. Sebastian has been struggling to get Peter to realize his own feelings for years but he is starting to worry that it may never happen. Peter seems to want no part of the future that Sebastian is offering him, on the surface at least. But a future without Sebastian might be something that not even a mind like Peter's can imagine.