Oye Chill Maar follows the story of four close friends—Prem Thakur (Shrey Pareek), Guddu Dubey (Tejas Devrukhkar), Govardhan (Sujeet Asthana) and Vikas (Prashant Mohite)—who enjoy a carefree life together. Prem is in love with Sumi (Prachi Bansal), but his father, Dinesh Thakur (Atul Tiwari), has other plans and wants him to marry Neha, the daughter of Meenu Thakur (Meenu Sharma). When Prem and his friends travel to Varanasi to meet Neha, their journey takes an unexpected turn when they are robbed on the highway. Even more surprisingly, the robbers appear to have a connection with Meenu Thakur. At her haveli, the four friends encounter not only Neha but also Kajal (Sufia Tanweer), Sneha (Shikha Pandey), and a mysterious milkmaid. Things take a dramatic turn when Kajal, a social media influencer, mysteriously disappears on Holi. What follows is a chaotic and intriguing hunt for Kajal, as the four friends find themselves caught up in a mystery far beyond their carefree lives.