In the aftermath of an attack on the castle, a blood-thirsty Francis makes a startling decision that will forever change his rule as the King of France, causing him to track the missing Narcisse with a newfound lust for revenge. Meanwhile, Mary is stunned to discover the truth behind Francis' recent decisions and embarks on a treacherous mission of her own with Lord Condé (Sean Teale). Leith urgently pleads with Greer to flee the country after violence erupts across the land. Catherine receives an unexpected and erotic visit in her chambers after making a final decision regarding the fate of her daughter Claude.

Mary finds out the truth from Greer about rumors going around Court, forcing Mary to do something she never thought possible. Francis finds himself in a growing rivalry with Condé for Mary. Bash's mother Diane returns, igniting a long overdue confrontation with Catherine, while Claude is determined to find out the truth about who really killed the twins.