| Director | Adhik Ravichandran |
|---|---|
| Country | India |
| Box office | ₹100 crore |
In 1975, Chiranjeevi, a scientist, invents a telephone that allows its users to make calls to people in the past by selecting a date; only one call can be made for each selected date. Meanwhile, gangsters Antony and Jackie Pandian, best friends in Chennai, have a common enemy named Ekambaram. Ekambaram decides to take revenge against Antony for killing his brother. He kills Antony in a club; Chiranjeevi dies in the crossfire. Jackie soon becomes the solo kingpin, adopts Antony's son Mark, and raises him like his own son.
In 1995, Mark, now a mechanic in Royapuram, hates Antony for being responsible for his mother Vedhavalli's death. He is in love with his neighbour Ramya and decides to marry soon. He decides to sell his garage and move away from Royapuram, but Jackie disallows him, fearing for his safety. At the registrar's office, Ekambaram tries to shoot Jackie, but the latter kills him later that night. Ramya's mother learns that Mark is Antony's son and asks him to leave Ramya alone.
One day, a drunken Mark finds Chiranjeevi's telephone and realises its capabilities. Using the phone, he first saves his mother and younger self from Ekambaram and his men. He then warns Antony's advocate, Selvam, about his upcoming demise and asks him to meet him in 1995 at his garage. Selvam evades death, and Mark learns from him that Antony was not a bad person and Mark was made to believe it by Jackie, the actual mastermind behind Antony and Vedhavalli's deaths, as Antony refused Jackie's involvement in illegal activities like drug smuggling, arms trafficking and prostitution. Mark manages to change history by making calls to the past, where Antony kills Jackie.
Mark soon wakes up in the present to find that he is in Jackie's place as a gangster with Ekambaram as his guardian, while Jackie's son Madhan is in Mark's place as a mechanic. Madhan soon learns about the telephone and Mark's involvement in changing history. He uses it to inform Jackie. Jackie attempts to kill Antony, but Antony survives all the attempts and learns about Jackie's true intentions. Jackie and his men surround Antony and Ekambaram at the club, and Antony is seemingly killed. Mark awakens in the present to find himself back as a mechanic along with Ekambaram, while Jackie is still alive, and Madhan is a gangster.
Madhan kidnaps Ramya and orders Mark to arrive at the club godown. Mark arrives, and Madhan and Jackie's men thrash him. However, Antony arrives at the godown; it is revealed that Ekambaram saved Antony in the club shootout and had sent him to Colombia due to many encounter killings of gangsters by police. Antony gained the partnership of the Colombian underworld as Jackie usually sent commission to the gangsters under Antony's name. Antony kills Jackie's henchmen using Anaconda, a large machine gun and finally kills Jackie and Madhan.
Antony reunites with Mark and uses the telephone to call Vedhavalli, but she is held at gunpoint by Chiranjeevi who takes over the call, demanding his telephone back from Antony. Chiranjeevi discovers he himself is being held at gunpoint by Jackie, demanding to talk to Antony. Antony laughs at Jackie and replies, "Welcome back".