The Evil Queen (Lana Parrilla) threatens the whole town of Storybrooke and she might just acquire the hearts of Snow (Ginnifer Goodwin) and David (Josh Dallas). Meanwhile, Aladdin (Deniz Akdeniz) will have a hard time saving Agrabah when it no longer exists.

Previously in "Once Upon a Time" season 7, the Evil Queen has tricked Rumple (Robert Carlyle) into making a bargain with her. The Evil Queen holds the magic shears that Rumple wants to use to save Belle (Emilie de Ravin) and their baby, and she will only hand it over to him if he helps her get what she wants, which is the heart of Snow White.

In the upcoming seventh episoden — titled "Heartless" — the Evil Queen has gathered a destructive and mysterious substance in a bottle. She then tells everyone that it will destroy Storybrooke unless Snow and David surrender their hearts.

According to the synopsis released by CarterMatt, "In Storybrooke, the Evil Queen threatens to destroy the town and everyone in it unless Snow and David surrender their hearts. As Emma (Jennifer Morrison), Hook (Colin O'Donoghue) and Henry (Jared S. Gilmore) prepare to defend Storybrooke, Snow, David and Regina search for a magical sapling created by the first spark of true love. Regina uses Gold's and the Evil Queen's burgeoning romance against them, and Zelena (Rebecca Mader) offers Belle some friendly advice."

It appears that they will try to use Rumple and the Evil Queen's old spark of true love. But with the Evil Queen split into two and all the goodness contained in her alternate form Regina, will true love still work?

If all else fails, maybe Snow and David will resort to giving up their hearts to the Evil Queen, and become what the episode title suggests- "Heartless."

Meanwhile, Aladdin has given in to Jasmine's (Karev David) plea to save Agrabah. But it was revealed that Agrabah no longer exists after a huge sandstorm swallowed it whole. Will Aladdin take on saving Agrabah as the Savior?

According to series creator Adam Horowitz's interview with The Hollywood Reporter, "Despite how dark and scary things can get, there's always a hopefulness at the core of the storytelling. I think with the Aladdin story and how it meshes with the 'Once Upon a Time' story, the same will hold true."

"Once Upon a Time" season 6 airs every Sunday at 8 p.m. EDT on ABC.