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Kangana Ranaut, Saif Ali Khan have been roped in a movie based on the popular romantic thriller novel 'Devotion of Suspect X'. Saif plays a mathematics professor, who helps his neighbour (which will be played by Kangana) who is accused of murdering her husband. Sujoy Ghosh was directing the Hindi adaptation of the best-selling Japanese romantic thriller The Devotion Of Suspect X written by best-selling author Keigo Higashino.
