“Wolfwalkers,” an animated feature film coming soon to Apple TV+, today received its prologue trailer ahead of its December 11 premiere in theaters and on the video-streaming service.

The film deals with superstition and magic during a time when wolves are seen as demonic and beasts that must be tamed. The story follows a young apprentice hunter named Robyn who comes to Ireland with her father to wipe out the last pack of Wolfwalkers.

Watch the prologue trailer embedded below.

“In the cover of darkness, the Wolfwalkers come out to play,” reads the video’s description. “Discover the lost legend of the Wolfwalkers.” You can also watch the official teaser and the original trailer for the animated film.

Apple’s description of the project:

In a time of superstition and magic, a young apprentice hunter, Robyn Goodfellowe, journeys to Ireland with her father to wipe out the last wolf pack. While exploring the forbidden lands outside the city walls, Robyn befriends a free-spirited girl, Mebh, a member of a mysterious tribe rumored to have the ability to transform into wolves by night. As they search for Mebh’s missing mother, Robyn uncovers a secret that draws her further into the enchanted world of the Wolfwalkers and risks turning into the very thing her father is tasked to destroy.

Apple picked up the rights to “Wolfwalkers” back in September 2018 from Cartoon Saloon and Melusine Productions. The animated film is co-directed by Oscar-nominee Tomm Moore and Ross Stewart (“Song of the Sea”). It’s written by Will Collins (“Song of the Sea”) and produced by Nora Twomey, Paul Young and Stéphan Roelants.

Moore said that the unique animation style in “Wolfwalkers” is meant to showcase both sides in different styles. The people who live in the forest are represented by curves, while the townspeople are all straight lines. “If the characters are angry, they might actually have angry lines,” he said . “If they’re happy and free, they’ll have very wild, free lines. If they’re very uptight, they might have very tight lines.”