Arrambam (2013)

Arjun is a gifted hacker with a normal life until a stranger called AK and his partner Maya pull him into a chain of strikes on powerful people across Mumbai, using Arjun's skills as their weapon. Arjun and the police both think AK is a terrorist, until the reason behind his mission begins to surface: a deadly scam that cost lives during one of the darkest nights in the city's history. Directed by Vishnuvardhan, who had earlier made Billa with Ajith, Arrambam ("the beginning") was a major hit of 2013 and is remembered for its stylish action, Yuvan Shankar Raja's score and Ajith's salt-and-pepper look. Arya, Nayanthara and Taapsee co-star, with Rana Daggubati in a key role.