'Ponniyin Selvan 1', or 'PS1', the epic movie made on a whopping Rs 500-crore budget by ace director Mani Ratnam, is to hit the screens on September 30. The movie, based on the 1955 novel 'Ponniyin Selvan', by Kalki Krishnamoorthy is, according to Mani Ratnam, his masterpiece and he has been able to helm it only after several failed attempts.