Captain Hook (Colin O'Donoghue) and Ariel (JoAnna Garcia Swisher) will be teaming up with each other in the next episode of Once Upon a Time.

Main Character Killed Off In Next Episode of Once Upon a Time?

Episode 17 of Once Upon a Time's third season features some interesting conflict between Hook and Ariel that gradually turns into an allegiance. On Tuesday, ABC released a plot synopsis for the episode, which is titled The Jolly Roger.

"Ariel returns to Storybrooke and pleads with Hook to help her find Prince Eric, who never returned to the town when the new curse was invoked," the synopsis reads.

Regina Ready To Feel "Deep & Real" Love Again?

There will also be flashback scenes of Fairy Tale Land over the past year in which Ariel confronts Hook about her missing prince. The mermaid assumes that Hook has captured Eric and killed him. Hook then tells Ariel that the Jolly Roger was stolen, and likely by Eric's captor. After Ariel provides Hook with a clue about who the captor might be, the pair sets off on an adventure to find the ship.

Meanwhile, Emma (Jennifer Morrison) finally agrees to allow Regina (Lana Parrilla) to teach her some magic in order to defend herself and ultimately defeat Zelena (Rebecca Mader), a.k.a. the Wicked Witch.

Elsewhere, Snow/Mary Margaret (Ginnifer Goodwin) and Charming/David (Josh Dallas) must entertain Henry (Jared Gilmore), who considers the pair "boring" in comparison to Hook.

Once Upon a Time season 3 airs Sundays at 8 p.m. on ABC.

Watch the promo for the next episode of Once Upon a Time below: