Siddharth and Kaliswaran Moorthy are two youngsters in Chennai who apparently have no family and are living alone. They are shown as freelance techies working from home. Siddharth falls for a door-to-door beautician, Meera. He proposes to her and she accepts. Kallis has a crush on Meera's friend, Shreya, a chef. Meera is revealed to be an orphan brought up in an orphanage and Shreya is revealed to be sent away to fend for herself as her family faces trouble from loan sharks back in her hometown. The guys spend their money and soon realise they are running low. This is when it is shown that they are con artists, who use online shopping scams to earn money.DCP Pratap Chakravarthy begins to investigate their scam when his daughter's laptop explodes. He realizes that the scammers use the addresses of abandoned houses and public Wi-Fi to order electronic products on online platforms and return or re-sell them online after replacing original internal parts with old and duplicate ones. As DCP Pratap tries to track down the culprits, Siddharth changes their plan and now the boys loot expensive items from luxury cars by developing a device that hacks into the locking systems of such cars. Pratap almost closes down on them when the boys steal his friend's laptop from his car and try to sell it, but the boys escape successfully. Meera calls Siddharth and informs him that her handbag was snatched. She cries that though only Rs. 3,000 (US$38) was stolen, it had been hard-earned money. Siddharth feels guilty and the friends decide to mend their ways.They decide to settle in Goa by starting a restaurant with the remaining money from their scams and move to Goa with Meera and Shreya. Pratap tracks down the boys' address only to find the house vacated. He soon follows them to Goa. It is then shown that, though Pratap was investigating the online electronic products scam and the car thefts. He had actually begun tracking Meera and Shreya, who are even bigger con artists than Siddharth and Kallis. He informs them that the girls' motive is to make men fall for them, then loot their money. He had initially identified Meera as one of the con artistes using a distinctive necklace that had been in the handbag snatched from her, then identified her connection to the guys, following which he had gone to Siddharth and Kallis's former home in Chennai and had eventually traced them to Goa. Siddharth and Kallis find their bag of money missing and are heartbroken to discover that the girls they had truly loved had cheated them.They hitchhike to Chennai with empty pockets and slowly use their criminal minds to find the girls. They figure out that the girls are at Delhi, with Meera in the identity of Ishita, a freelance room arrangement consultant and confront them. Shocked, the girls return the bag of money and ask them to leave, but Siddharth proposes that they team up and share the amount they steal in the next venture. If the girls fall for them in the process, they will remain together. Otherwise, they plan to share the loot and part ways. It is also revealed that Meera's real name is Madhumitha and Shreya's real name is Varsha, and that both of them were orphans in the same orphanage, who had taken to con artists after being fed up of the deceit in society, especially its men. Madhu and Varsha agree to Siddharth's deal. They decide to target a rich, old businessman named Sooraj Mehta, who is in love with Madhu (as Ishita) in meditation class. Varsha also befriends Sooraj's wife in gym.Using their technological brain, the gang slowly break down the security features in Sooraj's car and house. Using a spycam in Madhu's phone and a voice recorder designed as a bracelet. However, they realize that Suraj is a drug baron, who has US$1 million in his house, which is equivalent to Rs. 71 crore. When the others decide to play safe by dropping the plan, Siddharth convinces them to stay on, and flee overseas after the heist to avoid Sooraj's wrath. They plan to enter the garage in Sooraj's house by using his Rolls-Royce and get his fingerprint to enter the locker room using a 3D printer. As per Siddharth's plan, Varsha is to spend the day shopping with Sooraj's wife and Madhu is to spend time with Sooraj, while the guys loot the money using Sooraj's car. They plan to hijack Sooraj's car while it is parked at the Hyatt Hotel car park, and use it to enter Sooraj's compound, knowing that they will not be seen as the car's windshield and windows are tinted.However, their plan changes when Sooraj drives to his private guesthouse instead of the Hyatt Hotel, to the surprise of Madhu and the others. Shocked, the guys follow the car to a suburban area. Madhu is inside with Sooraj and the guys have only one hour to complete the heist, instead of the two that they had planned for. Siddharth tells Kallis that Sooraj's car is advanced and can be hacked to do many things. He opens an app he had devised and has the car drive itself out of the guesthouse, with some help from Kallis. They then drive to Sooraj's house and safely enter the garage but finds out that to enter through the second security door in the garage, a pattern is required. Siddharth asks Madhu to find out Sooraj's phone pattern and the guys successfully enter the garage. With the 3D printed thumbprint, they enter the locker room, open the locker and steal the money. Madhu fakes a fainting and a nosebleed and the guys return the car to the guesthouse, just in time for Sooraj to rush an 'unconscious' Madhu to the hospital. When Sooraj goes in to bring out the doctors, Madhu escapes.Since it would be impossible to take the cash out of the country through an airport without raising suspicion, Siddharth tells that they are going to Thailand by road and the pairs set off on their bikes. However, they encounter Pratap doing vehicle checks at their hotel gate and Siddharth devises a plan quickly. Before the guys leave to confuse Pratap, the girls reveal that they have fallen in love with them. Happily, the guys rush off and tell Pratap that the girls are escaping in a white car. Following a car that the guys point out, Pratap assumes that they are going to the airport. He then assaults a security guard at the airport and breaches the airport security to apprehend the girls, and the guys escape. Siddharth and Kallis call Madhu and tell the girls that they have all the money and that the bags in the bikes are empty. They say that it is their plan of vengeance and that the cops will reach their location in a few minutes.The girls are left shocked and devastated, and tell themselves that they deserve this for cheating Siddharth and Kallis in the first place. However, when the police vehicle enters the hideout, Siddarth and Kallis get out of the car and say that they were just messing around and that the money really had been in the bags that the girls had. They say that because the girls didn't try to run away but stayed on feeling they deserved this for cheating Siddharth and Kallis, they think the girls have really started loving them and both couples reconcile and decide to settle down. In Chennai, Pratap is being questioned by the CBI for breaching airport security and for abandoning a high-profile match-fixing case that he had been working in Delhi (for which he had been checking vehicles) to go after two girls who are small-scale cheaters. It is revealed that Pratap was also a victim of Madhu's scams.In a scene mimicking a scene from Gautham Vasudev Menon's romantic film Vinnaithaandi Varuvaayaa, he had gifted her a rare, expensive necklace to Madhu - the same one that he had used to track her down when her handbag was stolen in the first place. Ashamed to declare that he was also a victim, Pratap hangs his head low and it is indicated that he might face a suspension for abandoning his match-fixing case. Back at Sooraj's house, Sooraj watches a CCTV footage of Siddharth and Kallis stealing the money but their face is hidden. The guys have used infrared flashlights on their caps, which have deceived the camera. Sooraj cannot complain to the cops as it is illegal money. As they are camping on their way to Thailand, Madhumita sees her name tattooed on Siddarth's forearm and she guiltily tells that it is not her real name, only to get deceived as Siddarth, who rubs the ink off and Varsha reveals herself as Thenmozhi and Madhumita asks Siddharth to guess her name and all four of them squabble on.