A gruesome serial killer is terrorizing London while brilliant but disgraced detective John Luther sits behind bars. Haunted by his failure to capture the cyber psychopath who now taunts him, Luther decides to break out of prison to finish the job by any means necessary.

England, early 20th century. The future writer and philologist John Ronald Reuel Tolkien (1892-1973) and three of his schoolmates create a strong bond between them as they share the same passion for literature and art, a true fellowship that strengthens as they grow up, but the outbreak of World War I threatens to shatter it.