12 'O'Clock is a psychological thriller drama that revolves around a young girl Gauri (Krishna Gautam) who has the habit of sleepwalking while also witnessing traumatized and frightening incidents during it. This habit of hers gives her family members sleepless nights wondering if she is possessed or is just a disorder. But as things start to unfold and despite seeking psychiatric treatment things go haywire for Gauri with no one having a clue about the reason behind it.