Appearances are dangerously deceiving in It’s What’s Inside, a horror comedy in which youthful insecurities, desires, and resentments lead to dizzying disaster. Premiering on Netflix on Oct. 4 following its acclaimed bow at the Sundance Film Festival, writer/director Greg Jardin’s feature debut cares far less about scares than thrills, and it generates plenty of giddy ones as it mires its characters in a predicament of head-spinning proportions.

Aimed at a twentysomething crowd in both style and substance, and best seen with as little prior knowledge as possible, it’s an inventively loopy ride that gets entertaining mileage out of the fantasy of walking in someone else’s shoes—at least, for a brief time.

Moving at the same pace that its heroine scrolls through her social media accounts—which is depicted on-screen via rapid-fire split-screen cuts—It’s What’s Inside feels like it’s hopped up on too many Red Bulls, and that hyperactivity is central to its flip-flopping story.

Shelby (The Consultant’s Brittany O’Grady) surprises her boyfriend Cyrus (James Morosini) by donning a wig and lingerie and enticing him with, “Oh hey, cutie,” the catchphrase of their classmate-turned-Instagram celebrity Nikki (Alycia Debnam-Carey), whom Cyrus not-so-secretly craves. No matter the effort, her seduction fails miserably. However, a more elaborate bout of role-playing is in their future once they arrive at the wedding of Reuben (Devon Terrell), who’s invited many of their pals to hang out the night before the nuptials, including Nikki, tattooed trust fund braggart Dennis (Gavin Leatherwood), pothead Maya........

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