Bike Ambulance Dada is a Bengali biographical drama starring Dev as Karimul Haque, a real-life humanitarian from rural Bengal who became known for providing emergency medical transport to people in need.

After his mother dies because timely medical transport is unavailable, Karimul decides to help others facing similar difficulties. He transforms his motorcycle into a makeshift ambulance and begins carrying sick and injured people to hospitals, often travelling long distances to save lives.

Despite limited resources and numerous challenges, he continues his selfless service, bringing hope and medical assistance to remote communities.