The film opens in Kuala Lumpur, with a man named KK (Vikram) escaping from the Petronas Twin Towers, wounded from a shootout, away from two anonymous hit men. They chase him, while his brother, Nandha (Siddhartha), tries to safeguard him. He is then chased by them and brought to a shootout point until getting in a vehicle accident which leaves him unconscious and admitted in a hospital.

Meanwhile, Vasu (Abi Hassan), who has just moved on to Malaysia with his pregnant wife Aatirah (Akshara Haasan), works as a doctor in night shift. Vasu is insisted by Aatirah to call her mother and convince her to come there and take care of her. He leaves the night to the hospital, where he notices KK unconscious and one of the hitmen from the shootout trying to kill KK. KK is almost seen to death until he gets saved by Vasu. Vasu calls the cops to inform this matter. They take KK's fingerprints and leave the hospital. Vasu goes home and proudly tells to Aatirah about the heroic act that he performed until being hit by Nandha, who has come to kidnap Aatirah. He insists Vasu to get KK from the hospital to get his wife back.

Meanwhile, we see two teams in the department, one led by Vincent (Vikas) and the other by Kalpana (Lena), who are competitive as Vincent receives most of the big cases, including the recent case about the murder of an industrialist. By examining the fingerprint, Catherine Williams (Cherry Mardia), who is from Kalpana's team, informs her that the injured man is KK, who turns out to be a gangster, gypsy, police, double agent, undercover agent and one who has performed a lot of crimes. He was a smart and vigilant man as he was never framed and only suspected, who turns out to be one of the cases unsolved by Vincent, which leads Kalpana to get hold of KK.

By the time, to get his wife back, Vasu brings a conscious KK out of the hospital by struggles as he encounters a police and doctor, which lets him have a gun to threaten KK. KK then tells Nandha to bring Aatirah to a metro station, but as the hitmen from the encounter enter the area, KK and Vasu are not able to meet Nandhu and Aatirah properly. KK then takes Vasu to his hideout to get his stitches fixed and the plan to exchange Aatirah that night in their place. While KK takes a shower there, Vasu calls Kalpana as she had given her visiting card. She tries to reach there to Vasu's rescue, while Vasu is point blank by a gun that KK took while bathing. While he organizes all the weapons and his suit and other gadgets, Vincent and his team enter his room and handcuff him. Soon then, Kalpana enters the scene and grows into an abomination who then gobbles Vasu and his wife Aatirah.vincent shoots kalpana & she is dead.finally the story ends with vasu meeting his wife in the hospital,they are blessed with a baby girl.vincent is with the police as the cctv puttages were against him.In the last scene its shown that athira is carrying,it's their daughters birthday,calling bell range & an anonymous gift in front of their flat was found.vasu opens it.It was a chain that he earlier gifted his wife and was lost during the incident.vasu opens the message it's written there -Anbudan(with love) KK.so they got the lost chain as a gift to their kid from kk.

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