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Mersal (transl. Zapped) is a 2017 Indian Tamil-language action thriller film directed by Atlee and produced by Thenandal Studio Limited, in the studio's hundredth film production. The film stars Vijay in triple roles, alongside S. J. Suryah, Kajal Aggarwal, Samantha Ruth Prabhu and Nithya Menen. Sathyaraj, Vadivelu, Hareesh Peradi, Kovai Sarala and Sathyan play supporting roles. It is the second out of the three collaboration between Vijay and Atlee, before they began working with others. The film follows two brothers who were separated after the younger one's birth; Vetri, a vigilante magician who is against the medical crimes and Maaran, a reputed doctor who charges meagre amounts from his patients.