London, 1385. Surrounded by ruthless courtiers—including his powerful uncle, John of Gaunt, and Gaunt's artful mistress, Katherine Swynford—England's young king, Richard II, is in mortal peril. Songs are heard across London, said to originate from an ancient book that prophesies the ends of England's kings—including Richard's assassination. Only a few powerful men know that the cryptic lines derive from a "burnable book," a seditious work that threatens the stability of the realm. To find the manuscript, wily bureaucrat Geoffrey Chaucer turns to fellow poet John Gower, a professional trader in information with connections high and low.

Gower discovers a conspiracy that reaches from the king's court to London's slums—and potentially implicates Gower's own son. As the intrigue deepens, it becomes clear that John Gower, a man with secrets of his own, may hold the key to saving the king, and England itself.