Be careful what you wish for, Emma Swan. Storybrooke’s Savior will find herself in danger on Sunday’s midseason finale of “Once Upon a Time.”

ABC’s synopsis for the Season 6 winter closer, titled “Wish You Were Here,” teases the heroes will find a weapon that will help them defeat the Evil Queen (Lana Parrilla). Despite their best efforts, however, when she learns of their progress, she’ll find a new way to defeat Emma (Jennifer Morrison) and her family in episode 10.

“The Evil Queen steals Aladdin’s magic lamp from Jasmine and makes a wish that could sideline the Savior forever,” the synopsis reveals. The network’s promo reveals Regina’s evil counterpart will somehow make Emma disappear after she wishes she was never the Savior.

With Emma missing, David (Josh Dallas) will be “unwilling to wake Snow,” who currently shares the Evil Queen’s sleeping curse with him, to help find their daughter. Without his love by his side, he’ll turn to Emma’s partner, Hook (Colin O’Donoghue), and her son Henry (Jared Gilmore) to “hold the Evil Queen at bay in Storybrooke.” Meanwhile, Regina will do her part by going on a “rogue rescue mission,” which according to the promo, appears to include her visiting Emma in the Enchanted Forest.

Elsewhere in the installment, Rumple (Robert Carlyle) and Belle (Emilie de Ravin) will face their own troubles. With their marriage in shambles and Belle’s decision to send their baby boy way to live with the Blue Fairy (Keegan Connor Tracy), out of harms way, the estranged couple will face a new, secret hardship in episode 10. “Gold and Belle face a surprising danger to their newborn son,” the summary hints.

Check out the episodic photos for the “Once Upon a Time” winter finale above and don’t forget to tune in to “Wish You Were Here” Sunday at 8 p.m. EST on ABC.