Doosraa is a crime thriller set in Mumbai during late 1980s. The story revolves around two lead characters - Ek, and Doosraa. Ek is the undisputed contract killer in the country, who has set very high standards in executing his contracts and eliminating his targets. However, his realm is shaken by the sudden arrival of a younger, cheaper, and much more adventurist contract killer - the Doosraa. The story covers the ensuing conflict and lastly the final showdown between the two contract killers.