Lana Parrilla Lana Parrilla

Get ready to enter a parallel universe of fairy tales in ABC's Once Upon a Time.

Executive-produced by Lost's Adam Horowitz and Edward Kitsis, the upcoming series tells the story of the Evil Queen (Lana Parrilla) casting a spell upon classic fairy-tale characters who live in Storybrooke, Maine, and don't know their own true identities.

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Confused? Parrilla lays out the details of the series, which also stars Jennifer Morrison and Ginnifer Goodwin, in this exclusive first-look video. It also gives you a sneak peek into just how evil the Evil Queen is.Once Upon a Time premieres Sunday, Oct. 23 at 8/7c on ABC. "You should watch it, because if you don't, I'm going to cast a spell on you," Parrilla jokes.