The Bhootnii is a horror-romantic-comedy set at Delhi’s St. Vincent’s College where Shantanu (Sunny Singh) and his roommates, Sahil (Beyounick), and Nasir (Aasif Khan) study and stay. Behind the hostel is a Virgin Tree which is haunted by Mohabbat (Mouni Roy), a spirit who awakens every Valentine’s Day in search of true love—but takes souls on Holika Dahan. No one knows the mystery behind her identity as it leaves everyone clueless while every night students begin experiencing hallucinations, epileptic episodes, and even die by suicide. The college management turns to Baba (Sanjay Dutt), an alumnus of the college and a para-physicist by profession who arrives with his quirky contraptions to uncover the truth and banish the spirit.