It's going to be a big episode for Hook (Colin O'Donoghue) and Ursula (Merrin Dungey) next week on ABC's Once Upon a Time.

'Once Upon a Time's Hook Did Something 'Far Worse' Than A Sexual Crime With Ursula?

ABC has released a plot synopsis for the next episode of Once Upon a Time, which is titled Poor Unfortunate Soul. With the title being an obvious nod to the song Poor Unfortunate Souls, which Ursula sings in The Little Mermaid, it is clear that fans will now get to see the evil sea witch's backstory.

Not only will this be delved into, but her history with Hook will also be addressed.

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"Hook leverages his complicated history with Ursula to find out what she knows about Gold's [Robert Carlyle] endgame," the synopsis reads. "In a Fairy Tale Land flashback, when a restless young Ursula enlists Hook's help to run away from home, she soon learns it isn't wise to trust a pirate."

Meanwhile, Gold and his Queens of Darkness torture August (Eion Bailey) in order to get information about the Author. Our heroes, Emma (Jennifer Morrison), Mary Margaret (Ginnifer Goodwin) and David (Josh Dallas) are on the hunt to find them.

Additionally, "Regina [Lana Parrilla] grows concerned for Robin Hood's [Sean Maguire] safety while she struggles to maintain her cover with the villains."

Regina has been straddling the line between good and evil for a while now, so it will be interesting to see if she gives in to her good side after spending so much time with the heroes.

Once Upon a Time airs Sundays at 8 p.m. ET/PT on ABC.

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

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Once Upon A Time, Television, ABC