When an icy spell is cast on Marian, which will ultimately freeze her heart and kill her, the Storybrooke residents place the blame on Elsa. But unbeknownst to anyone, a mysterious woman who runs the town's ice cream parlor has the same powers as Elsa and is trying to frame her. Emma and David find former Merry Men member Will Scarlet rummaging through Robin Hood's tent, Regina teams up with Henry to try and discover who the author of the fairy tale book is, Mary Margaret is having trouble balancing her duties as leader of Storybrooke and mother to young Prince Neal, and Hook begins to suspect that Mr. Gold is still in control of the dagger that calls upon him to be the Dark One. Meanwhile, in Arendelle of the past, Elsa and Kristoff set off to stop Hans from attempting to take control of the kingdom.

Regina reluctantly teams up with Emma to search for the Snow Queen after Sidney, who is once again Regina's prisoner in the mirror, discovers her whereabouts and agrees to lead her to the location. With Belle babysitting baby Neal, a nervous Mary Margaret and David prepare for their first date night away from their child and find themselves on a mission to track down Will Scarlet, who has escaped from the town jail, and Elsa sees Anna in the Storybrooke woods. Meanwhile, back in the past, young Emma finds herself a kindred spirit when she befriends a girl who, like her, is a runaway orphan.