In the underbelly of North Chennai, 'Diesel' is a film that weaves crime, stubbornness, and a social message.

Portraying the struggles within the world of North Chennai's fishing community and diesel smuggling, 'Diesel' weakens its narrative by placing excessive emphasis on a social message. The performances of Harish Kalyan and Vinay Rai salvage the film to some extent, but it fails to reach the anticipated emotional intensity.