Zehan is a psychological thriller that centres around Aakash (Aarya Babbar), a man suffering from a personality disorder and childhood trauma who falls in love with Mona (Nidhi Nautiyal). However, he struggles to maintain his relationship with her as whenever he encounters Mona, their relationship takes unexpected twists and turns, leading to a web of secrets, love, and suspense. As the story unfolds, it delves into a world of dark emotions and twisted connections that showcase how powerful a human mind can be that many of us are yet to explore.