Nostradamus tells Mary of his prophecy that one among them will die soon, which causes Mary to make a decision that will forever change her relationship with Francis. Clarissa becomes bolder with her endeavors, while Kenna informs Catherine of Diane's plan for Bash, which ends up backfiring.

When a plot to kill Bash goes wrong, Queen Catherine is suspected of orchestrating it. Mary offers to help free a wrongly imprisoned pregnant peasant named Isobel who has a mysterious tie to Bash. Meanwhile, Lola blackmails Queen Catherine to keep her from trying to ruin Mary and Bash, whose bond continues to grow.