We were gloriously wrong.
(Deducting one point only because the musical numbers can’t quite beat “Everything Stays.”)
The show is a defiant middle finger to the idea of “franchise integrity.” It argues that the stories we love don’t belong to their creators or their canon; they belong to the people who dream about them. Fionna and Cake exist because Simon was lonely. Because a fan wrote a story. Because someone, somewhere, wanted to see themselves in Ooo.
You’ve ever felt like your life lacked magic. You’ve ever read a fanfic better than the original. You’re ready to cry about an old man with a crown. Adventure Time- Fionna Cake
Why? Because she has no training. She has no scars. She has the idea of heroism without the cost. The show forces her to confront the fact that being a protagonist means causing collateral damage. Her arc is about graduating from “wanting adventure” to “accepting responsibility”—a lesson Finn learned in elementary school, but one Fionna has to learn as a broke adult. Adventure Time has always played with canon. Fionna & Cake weaponizes it.
And that’s exactly why it’s brilliant.
This is the genius of the show’s first act. By stripping away the candy people, the vampires, and the dimensional rifts, Fionna & Cake asks a brutally honest question: We were gloriously wrong
The series argues that happy endings are a lie we tell children. For adults, endings are just new beginnings that are often less interesting. When Fionna accidentally breaks her universe, she isn’t unleashing chaos—she’s unleashing potential . Danger is re-introduced to a sterile world, and paradoxically, that danger feels like relief. On the surface, Fionna is a reboot of Finn: spunky, sword-wielding, impulsive. But the show actively dismantles that trope. Fionna is not a good hero. She gets her friends killed (temporarily). She ignores warnings. She throws tantrums when reality doesn’t conform to her expectations.
The villain, the Scarab, is an auditor of reality—a cosmic bureaucrat who wants to prune “unapproved” universes. This is a brilliant meta-commentary on franchise management and toxic fandom. The Scarab represents the fan who yells, “That’s not canon!” He represents the executive who says, “Stick to the formula.”
We find Fionna living in a non-magical, Simon Petrikov-created universe. She works a dead-end job, she’s bored out of her skull, and she desperately longs for the epic adventures she’s read about in Simon’s old fanfic. Cake, meanwhile, is just a normal house cat. The world is grey, mundane, and suffocating. Because a fan wrote a story
Fionna isn’t a hero. She’s a fan. And fans, as we know, can be messy, entitled, and desperate for a story that isn’t theirs. The original Adventure Time was about growing up. Finn the Human learned about loss, love, and responsibility across ten seasons. Fionna & Cake is about what happens after you grow up—the quarter-life crisis where you realize the story is over and the credits didn’t roll. 1. The Horror of a “Happy Ending” The show’s antagonist isn’t a Lich or a Vampire King. It’s the very concept of narrative closure . Simon Petrikov (formerly the Ice King) is now cured, living in a world he designed to be safe. But safety is suffocating. He has PTSD from his century as a mad king. Fionna has depression from her lack of purpose.
What creator Adam Muto and his team delivered is not a children’s cartoon, nor a simple “what-if.” Adventure Time: Fionna & Cake is a raw, existential, and surprisingly adult meditation on purpose, creation, and the terrifying beauty of a world without guarantees. It is the Neon Genesis Evangelion of the Adventure Time universe—a story that deconstructs its own premise before rebuilding it into something achingly human.