Teesra Kaun? is an action drama, which is a remake of the 1990 Malayalam film No. 20 Madras Mail. It revolves around the train journey in Howrah-Bombay mail of three Bollywood-stricken Nagpur-based men – Vijay Verma (Chunky Pandey), Bingo Nagpurkar (Satish Shah) and Khoka Ganguli (Rakesh Bedi). The three men head to Bombay to watch the cricket match, but they really hope to meet the Bollywood actor Mithun Chakraborty. During their journey, the three become friends and drink a lot of alcohol and have a heart-to-heart talk. Things go great until a murder takes place in their train and the three become the prime suspect. Will the three men be able to prove their innocence?