On paper, Joker: Folie à Deux promised to be a memorable experience, even for those who weren’t necessarily a big fan of Todd Phillips’ 2019 Joker. The first movie found a fervent fanbase for its nihilist take on the Clown Prince of Crime, and won Joaquin Phoenix an Oscar for playing the miserable Arthur Fleck. And the sequel boasted musical numbers and Lady Gaga as Harley Quinn — demented choices for a movie of this type, and thus all too apt.

Unfortunately, while this follow-up does deliver on the musical numbers, most of which feature Lady Gaga giving it her all, Phillips’s sequel proves to be a muddled love story that falls apart due to its inability to express anything thematically substantial or original. There are pieces of this movie which do prove to be genuinely engaging, but they’re largely driven by the passionate commitment of the core cast. Phoenix and his H.R. Giger-inspired shoulder blades are back, and this time… he tap dances! Much like this movie dances around its points.

Folie à Deux opens with a Looney Tunes-style cartoon (complete with the official Warner Bros logo and classic theme music) that at first suggests that it’ll be a recap of the first film. But no, it’s actually setting up the big question hovering over the sequel: Is Arthur suffering from a form of dissociative identity disorder, as manifested by his “Joker” persona? Or is he just a sad and abused man, lashing out at the world with violence? There’s a lot of talking around this question, but Folie à Deux never digs deep enough into the moral questions presented by that to come up with anything substantial to say.

Folie à Deux does feature a bit more plot momentum than the first film, thanks to the ever-reliable structure of a courtroom drama: Set relatively close to the events of Joker, the spine of the sequel is Arthur’s trial for all that murdering he happened to do in the first movie. However, that only helps the pace a little bit, since the movie’s more interested in its musical numbers, most of which exist solely in Arthur’s mind as he processes his newfound love for that cute blonde mental patient in Arkham’s less-secure ward.

The problem ends up being that while billed as a two-hander, Folie à Deux’s energies are focused far more on Arthur than on “Lee Quinzel,” with much of the latter’s screen time rooted in Arthur’s fantasies of them together. And the moments that allegedly represent reality don’t do much to help flesh her out as a character, even scenes in which Lee sings about their love.

While Joker was consumed by its grungy Scorsese-esque vibes, the musical nature of Folie à Deux borrows more from Bob Fosse, albeit clumsily; the playlist leans heavily on old standards and musicals from prior to 1981, including songs like “That’s Entertainment” from The Band Wagon and (naturally) “The Joker” from The Roar of the Greasepaint – The Smell of the Crowd.

Lady Gaga brings her own voice and physicality to Lee, a performance with a lot of fresh nuances to it, but despite her best efforts, unfortunately this take on Harley Quinn largely falls into cipher territory. The changes to the character’s backstory give her simultaneously more and less agency, somehow — she falls in love with Joker before she even really gets to know him, fully dedicating herself to his cause. But after a certain point, nothing’s demanded of her, beyond her unfailing support for her man.

Joker: Folie a Deux (Warner Bros.)

The lyrics of Gaga’s two original songs on the soundtrack, “Folie à Deux” and “Happy Mistake,” prove revealing about the lack of development Lee gets: The first is a song about how Lee is “insane in love” with Joker, and the second is a breakup song about how “I’m in a bad way/ If I could fix the broken pieces/ Then I’d have a happy mistake.” The new companion album Harlequin does a solid job of representing the character’s full arc across the film — it’s just not that much of an arc, in the context of the film, beyond someone thinking she’s in love, and then deciding she’s not.

Folie à Deux is actually an odd viewing experience for any longtime fan of Harley Quinn, because every previous incarnation, going back to Batman: The Animated Series, was more successful at bringing out Harley’s inner life. Like, here’s her very first appearance on TAS, in which the cartoon Harley quickly reveals herself to be more than a random lady sidekick. She’s devoted to Mr. J, sure, but also enjoys doing crime for the sheer giddy glee of it.

Yes, serious abuse is embedded in Harley’s classic origin story, but that only adds extra pathos to the character, on the occasions when she was able to confront that. Folie à Deux removes the abuse aspect, which is a striking choice that should arguably empower the character more, but instead Lee’s reduced to the role of shallow superfan, whose commitment to Joker feels more like a whim than a real substantial relationship.

While it’s disappointing that Lady Gaga’s iteration can’t rise to the level of Arleen Sorkin or Margot Robbie or Kaley Cuoco’s performances, at least there’s comfort in knowing that more compelling versions of the character still exist. And in fairness to Folie à Deux, it does show some signs of understanding a female point-of-view. Perhaps the sharpest scene of the movie is the return of Zazie Beetz as Sophie, Arthur’s previous “dream girl,” who’s called to testify in court about what her life has been like as a result of being publicly associated with Joker.

The short version: Sophie and her daughter have had to leave the city, after being harassed by Joker’s fans and blamed for his actions. She’s worried for her safety. If it was the year 2024, she’d have deleted all her social media accounts ages ago. The fear in her voice is the fear of every woman who’s been the subject of a violent angry mob over the past few decades. It’s the closest the movie comes to communicating a real point, and showing some real awareness.

In the end, while Phoenix is locked in when it comes to playing Arthur, Folie à Deux suffers from the same lack of depth as its predecessor; a mimicry of smarter and more substantial films that at least includes some fun pockets of style, before an unsatisfying conclusion. Its worst crime, though, is promising to be memorable — and ultimately failing.

Joker: Folie à Deux arrives in theaters on Friday, October 4th.