As Reign Season 3 Episode 7 begins, Mary and Don Carlos discuss their courtship and the political ramifications of aligning Scotland with Spain. He suggests a game called "the hound and the hare" but she declines, inviting him to tea instead. While speaking with Catherine, Mary gets a message from her brother James. Elizabeth has pulled her troops out of Scotland as well.
Catherine visits the privy council to find out when they will be ready to vote on her regency. Narcisse says they will vote when they're ready and she pushes them further. She convinces them to hold the vote on the following day. Narcisse follows her out of the chamber so they can negotiate the terms of his support. She promises him the position of Lord Chancellor if he votes in her favor.
Mary meets England's new ambassador, Gideon Blackburn. Gideon and his man plan to stop Mary from becoming engaged to Don Carlos. He's hiding a secret and England plans to use it to keep the Spanish away from Scotland. Don Carlos tells Mary he plans to leave as soon as his effects have arrived from Austria.
Bash and Delphine's relationship has progressed to one of intimate companionship, and he continues his search for the murderer in the village. He gets word of another death and visits the body. Delphine has a vision both of where the killer has been and where he will be going.
Lola and Narcisse discuss Catherine's promise to make him Lord Chancellor should he help her win the regency. He accuses Lola of not trusting him to stay away from Catherine.
Catherine berates Mary for not forcing Don Carlos to fall in love with her. Mary decides to store Don Carlos' luggage in the wine cellar without his knowledge so that she can look through it in order to decide whether to woo him.
Delphine's senses lead her to Greer's tavern and Bash wonders if she might be the killer's next target. Bash suggests they close the tavern until the threat has passed. Greer and her girls decide to fight back.
Mary finds Don Carlos walking the halls of the castle and offers to play the hound and the hare with him. She learns that in his version of the game, women are the pursuers.
Bash brings his men into the tavern which means Greer and Leith are in the same room once again. While they ready to catch a killer, the women of court ready to chase men through the woods. Lola and Narcisse play the game, along with Catherine. Catherine's lover Christophe decides to enter the competition, despite its being a game for nobles. Narcisse spies Catherine and her lover.
Mary hurts herself during the chase. Gideon finds her and sweeps her off her feet.
Greer sits with Leith to talk to him while they wait for the killer to appear and sees a trinket from Princess Claude on his cloak. They discuss her happiness and whether or not she's happy. She says she's independent, and that's something like happiness. As dawn draws near, Bash and his men depart from the tavern, leaving Greer alone. She goes outside to return Leith's cloak and Delphine begins to feel the dark man. While Bash rescues Greer, the dark man attacks Delphine.
Mary visits the wine cellar to have a look inside Don Carlos' luggage. He finds her and shows her what's inside. She doesn't believe she can marry him believing that their marriage wouldn't be the kind she wants.
The privy council begins their vote but before it can continue a cardinal enters the room and says Francis was poisoned. Narcisse has himself named Regent. Catherine convinces Mary to try Don Carlos' request in order to secure Scotland since she will no longer be able to help.