The story unfolds in the quiet town of Motihari, Bihar, where the Jaiswal family is celebrating the engagement of their eldest son, Sanjeev (Lalit Prabhakar). The festive atmosphere takes an unexpected turn when their eccentric, aging bachelor uncle, Ved Prakash Jaiswal, fondly known as Chachaji (Ashutosh Rana), announces that he plans to marry before his nephew's wedding, leaving the entire family stunned. Alarmed by his erratic behavior, the family consults a doctor and decides to admit Chachaji to a mental health facility in Ranchi. Believing it to be a routine journey, Sanjeev and his two cousins set off in a van with an unconscious and restrained Chachaji. However, what begins as a simple trip soon spirals into an unpredictable adventure filled with chaos, surprises, and unexpected twists.