Painter Dora Carrington develops an intimate but extremely complex bond with writer Lytton Strachey. Though Lytton is a homosexual, he is enchanted by the mysterious Dora and they begin a lifelong friendship that has strangely romantic undertones. Eventually, Lytton and Dora decide to live together, despite the fact that the latter has fallen in love with military man Ralph Partridge, whom she plans to marry.

In 1880s London, pornographic bookseller Verloc is a double agent for the Russian government, providing information to Chief Inspector Heat about a lazy anarchist organization. In order for the anarchists to be arrested, an act of terrorism must occur. So Verloc decides to set up bombs – which leads to tragedy – not only for himself but also for his family, including wife Winnie and brother-in-law, Stevie.