When a plot to kill Bash (Torrance Coombs) goes wrong, Queen Catherine (Megan Follows) is suspected of orchestrating it. Mary (Adelaide Kane) offers to help free a wrongly imprisoned pregnant peasant named Isobel (guest star Amy Forsyth) who has a mysterious tie to Bash. Meanwhile, Lola (Anna Popplewell) blackmails Queen Catherine to keep her from trying to ruin Mary and Bash, whose bond continues to grow.