The plot of "Kasoor" revolves around the character of Rajeev/Adi (played by Ajay Devgn), who finds himself at the center of a mysterious and thrilling sequence of events. Aishwarya Rai Bachchan plays the role of Shreya, a pivotal character in the story. The movie takes the audience on a journey filled with suspense, as the characters navigate through their complicated lives and relationships.