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.

As Mary and Francis investigate who was behind the poisoning of King Henry, they unearth secrets of the past which force Mary to confront her feelings for Condé as she attempts to move forward. Catherine finds herself in the middle of a romantic triangle when the Duke of Guise returns, which forces Narcisse to commit a hideous act out of desperation. Meanwhile, Greer finds herself in a situation she never fathomed in order to survive.