Victoria hatches a scheme which, surprisingly, involves Emily. Emily locates her next target and Declan learns something.
With Midnight now under the rule of Dark Witches, the surviving Midnighters must band together in one last, desperate attempt to save their town.
Elizabeth faces backlash for protecting Catherine, who returns to France imprisoned. Mary must make some difficult decisions.
Mary considers staying in France permanently, giving up her claim to the English throne. Nostradamus returns and has a vision about Francis' fate.
Mary must help Catherine in her quest, even if it puts the alliance with Scotland at risk. Elizabeth struggles with the thought of losing Dudley.