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The story follows (Rajinikanth), a mysterious man who takes a job as a college hostel warden in Ooty. Initially appearing as a playful and eccentric mentor to students, Kaali’s true identity is eventually revealed as Petta Velan , a man with a violent and complicated past in Madurai. The narrative shifts into a high-stakes revenge drama as Petta confronts his old nemesis, Singaar Singh (Nawazuddin Siddiqui), and his ruthless son, Jithu (Vijay Sethupathi). The film features an ensemble cast, including: Full cast & crew - Petta (2019) - IMDb