In this episode, Zelena is tempted with an offer by the Black Fairy that could put her in a dangerous situation that prompts Regina to be drawn into the chaos, while Emma and Hook's wedding plans are made more chaotic by Snow and David.
In Oz, a young Zelena is testing out her magic on a bird's nest by restoring it back on top of a tree after a group of kids knocked it off.
Moments later, after she studied the fragments, Regina shows up at the shop and realizes that Zelena has gone, leading her to the mines, since she finds her sister there and is hunting down the Black Fairy.
The Black Fairy absorbs Zelena's unstable dark magic to create the crystals needed for the final battle, then she sends them back to the outside of the mines.
Around the same time, David notices the loft opened and finds Henry still trying to write the final chapter but discovered he can't do anything to change the outcome.
Snow is looking at a series of venues, including Granny's and the Town Hall, to hold the wedding, but David isn't happy with his wife's ideas.
She soon meets up with Regina, Emma, Snow, David, Hook, and Henry, and reveals that she still has the Crimson Heart (that was bought from Oz via the tornado), which she used to absorb all of her magic in order to render the crystals useless.