The story of a man who played many roles but never let anyone close to him. At the end of his life, the highly respected art critic and curator of the royal art collections, Victor Maskell, is unmasked as a double agent - a friend has betrayed him. Isolated, Maskell begins to question his life. He reflects on his youth in Ireland, his studies at Cambridge, and the excessive social life in 1930s London. He juxtaposes appearance and reality: the influence of communism on intellectuals, the fascination with art, Maskell's inability to form deeper connections, and his activities as a Russian double agent. The Untouchable is the story of a man who played many roles but never let anyone close to him.