Regina steps up in an unexpected way to protect Emma; a celebration at Camelot turns deadly; Hook tries to bring Emma back to the light.
Heroes in Camelot work to free Merlin; when David goes on a quest to retrieve a magical relic, Arthur insists on coming along.
A charged confrontation sends the heroes on a collision course with destiny; Hook's lust for revenge against Gold puts them both in jeopardy; an unexpected evil is released.
Mary Margaret is unable to convince David that Arthur could be dangerous and decides to takes matters into her own hands; Hook's love gives Emma hope.
Henry asks Violet out; those searching for Gold break into Emma's house, where they find a glimpse of Emma's end game; Merida tackles her mission.