Insane

"Insane" is a gripping thriller that follows the story of a woman named Kang Soo-Ah, who is kidnapped and taken to a psychiatric hospital where she is subjected to horrific abuse and torture. A year later, a journalist named Na Nam-Soo stumbles upon Soo-Ah's journal and sets out to uncover the truth behind the psychiatric hospital's dark secrets. As Nam-Soo delves deeper into the mystery, he discovers a web of lies and conspiracy that threatens to consume him. Will he be able to uncover the truth and bring justice to Soo-Ah, or will he become the next victim?

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Some movies that have similar genres and were produced around the same time as Insane include Life, Limitless, The Killing of a Sacred Deer, The Empty Man, Inheritance, Nanny Cam.