The Serfsons

The Serfsons is the first episode of Season 29 and the season premiere.

Synopsis
In a magical medieval world, Marge's mother is turned into an Ice Walker, and the only way for Homer to seek the cure is to make Lisa perform illegal magic. When the King discovers this attempt, he kidnaps Lisa, and Homer must lead a feudal uprising to rescue her.

Plot
In the Kingdom of Springfieldia, the Serfsons receive a visit by a noble passing through the house on his horse, after which Milhouse invites the family to the city walls where new severed heads are being added. The family visits Jacqueline Bouvier at The Webs at Giant Spider Acres, a retirement forest, and then go to the city walls where Marge discovers that her mother's body is freezing over.

At Barber Hibbert's Surgery, Krusty is found with genital Snerfs, while Jacqueline is found with progressive frozen mortification, having being bitten by an icewalker. To save her, Krusty proposes a treatment, buying an Amulet of Warmfyre. However, the family is unable to afford it, and Marge tells Homer to raise the necessary money.

At Moe's, Moe receives a message attached to a crow, which turns out to be a prank from Bart. At the Springfieldia Human Power Plant, Homer and the others are working as slaves for Lord Montgomery, pushing a manual power generator wheel. Homer sneaks away to ask for money from Montgomery, however he is refused.

Lisa takes Homer down an alley to tell him that she has a solution. With the use of magic she turns a lead piece into gold, however she can't use her powers or the King will take her away and turn her into a sinister wizard. The King is then seen with his evil wizards scolding at them for creating an All-Smelling Tower instead of a all-seeing eye. Bart is then seen killing Milhouse clones with a ball and chain just for fun.

Back at home, Marge gives the amulet to her mother, but she tells Marge that she just wants to die because she has lived a long life. In the end, she agrees to live and they celebrate, eating Hobbits. The family is reunited and thrilled, until Sorcererintendant Chalmers comes in demanding they hand over Lisa to the king, as she has been a witch. Lisa is taken away to the King, while leaving Janey behind. Homer is willing to get her back and leads the people of Springfieldia to revolt.

They arrive at the walls of the castle, but are stopped when the door gets closed. Treestache, and other walking and talking trees, agree to help them by tearing down the walls, but they are chopped down to make ladders to scale the walls.

A big battle starts, and many locals are killed, before Jacqueline sacrifices herself to extinguish the fire in the dragon, removing the amulet, transforming into an ice walking statue and melting inside of it.

The people discover that extinguishing the dragon's fire removes the magic from the world, to their dismay, including magical creatures. Reluctant to bring science to the world, Homer relights the fire in the dragon's mouth, which then burns the village.