Jon travels to Dragonstone to negotiate with Daenerys Targaryen for her support against the White Walkers, leaving Sansa as regent in his absence. Soon after, Bran and Arya return to Winterfell. Littlefinger seeks to drive a wedge between Sansa and Arya by letting Arya find Sansa's letter to Robb asking him to bend the knee to Joffrey, causing Arya to confront Sansa. Sansa sneaks into Arya's quarters and comes across the "faces" Arya has taken from the various people she has killed on her travels; Arya catches Sansa and tells Sansa of her ability to assume people's identities with the faces before she threatens her.
