Once Upon a Time: A Tale of Two Sisters Season 4, Ep 1
Elsa arrives in Storybrooke. Regina tries to deal with the reappearance of Marian, previously thought dead by Robin Hood. Belle and Rumple find a vacant but well-appointed mansion in which to honeymoon, and Rumple finds a curious artifact within. Flashbacks pick up shortly after the end of Frozen, with Elsa and Anna preparing for Anna's marriage to Kristoff.