It’s What’s Inside – Ending Explained
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Let’s start with the plot of It’s What’s Inside: A group of friends gathers at Reuben’s mansion to party before his upcoming wedding. They’re all curious whether their estranged college friend, Forbes, will show up, and reminisce about the time they fell out after Reuben got expelled for bringing his younger sister, Beatrice, to a party and letting her drink. Beatrice, who was obsessed with Dennis, had a psychological breakdown after the party and was admitted to a mental health facility. Though it wasn’t Forbes’ fault she got drunk, the group pinned it on him to save themselves. So when Forbes unexpectedly arrives at the party with a mysterious bag, viewers might suspect he’s there for revenge.
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Forbes introduces a new game and pulls out a strange device that he straps onto everyone’s heads, including his own. The device allows them to swap bodies. He explains that he and his colleagues often play a game where they randomly swap bodies, and the others have to guess who’s inhabiting each body. A correct guess eliminates the player. To keep track, they take Polaroid photos to label who’s in which body as the game progresses.
Here’s a breakdown of the characters:
The girls:
Shelby – One of the first characters introduced. She’s dating her college sweetheart, Cyrus, but their relationship is strained, fueling her insecurities.Nikki – A popular social media influencer who used to date Dennis.Maya – A spiritual, fate-believing hipster.Brooke – A laid-back artist who’s almost always high.The boys:
Forbes – The owner of the body-swap device.Reuben – The wealthy host about to get married.Dennis – Rich, unemployed, and Nikki’s ex, also the guy Beatrice was obsessed with.Cyrus – Shelby’s boyfriend, with a wandering eye, particularly for Nikki.First Round: In the first body-swap round, Forbes stirs up confusion by calling Shelby a term of endearment while in Dennis’ body, making everyone think Cyrus is inhabiting Dennis’ body. Forbes plays along, letting Cyrus, who is in Reuben’s body, pretend to be him. Meanwhile, Cyrus (in Reuben’s body) kisses Maya (who’s in Nikki’s body), thinking she’s Forbes. Everyone experiences a different kind of high in their new bodies, and the game takes off.
Climactic Events: In the second and final round, Shelby swaps into Nikki’s body and loves the experience of being in a popular, beautiful girl’s body. But things take a dark turn when Reuben and Brooke, while in Dennis and Maya’s bodies, fall to their deaths while having sex on an unstable balcony. Now, Dennis and Maya’s bodies are dead, and the group can’t swap back. Panic sets in, and Forbes refuses to call the police, fearing his device will be confiscated. Dennis (in Cyrus’ body) loses it when Cyrus suggests he just take over Reuben’s body and live as him. Dennis calls the cops while in Cyrus’ body, falsely confessing that it’s Cyrus who pushed the couple to their deaths.
As tensions rise, Forbes (in Reuben’s body) tries to flee with the device, but Nikki knocks him out, and the group ties him up. Shelby is the only one Forbes had taught to use the machine, and they hope she’ll switch them all back. But in a shocking twist, Shelby decides she wants to stay in Nikki’s body. Meanwhile, Maya (in Shelby’s body) is happy to stay put, believing she’s been reincarnated since her original body is dead. Suspense builds as the final body swap happens just before the cops arrive.

Ending Explained: At the end, Beatrice, Forbes’ sister, arrives at the mansion but reveals she is Forbes and that it was Beatrice in Forbes body all along. Forbes then blames Dennis (who is in Forbes body) for everything, claiming he knew Dennis was secretly dating her behind Nikki’s back during college and lied about Beatrice being delusional. Beatrice blames Dennis for her time in the psych ward and had been plotting her revenge against the friend group ever since. Forbes, in a misguided attempt to reconnect with her, showed her the body-swapping device (yeah, bad idea), but Beatrice knocked him out and ran off with the machine.
At the party, Beatrice (in Forbes’ body) had been trying to steal Dennis’ trust fund money during the swap, and she succeeds. In the end, she escapes in Nikki’s body, taking the machine with her. Cyrus ends up in jail due to the false 911 call, and Shelby refuses to testify in his favour because he had agreed to her proposal that she remain in Nikki’s body and he go into Reuben’s, so they could both start a new life. Shelby reveals the idea was given to her by Forbes (who was in fact Beatrice, the shit-stirrer) to find out Cyrus’ true intentions. Betrayed that Cyrus agrees to Shelby hijacking Nikki’s body forever, she dumps him.
The final switch:
Shelby is back as Shelby.Cyrus is back as Cyrus.Dennis is stuck in Forbes’ body.Nikki is in Reuben’s body.Maya is in Brooke’s body.Beatrice is in Nikki’s body.Forbes is trapped in his sister Beatrice’s body.Read Next: Sunny Review: When Your Husband’s Secrets Include Killer Robots
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