Kannum Kannum Kollaiyadithaal

Two young IT professionals lead a flashy lifestyle but run online laptop scams. They buy genuine laptops with false identities, swap genuine internal parts with fake ones, and return the machine for refunds. They then resell the genuine parts for profit.

One such laptop with fake parts ends up with Deputy Commissioner of Police Prathap Chakravarthi and explodes. Chakravarthi traces the purchase and zeros in on Siddharth and Kallis. Their cover begins to crack as the police close in.

Siddharth and Kallis realize the police are onto them and decide to pivot from electronics fraud to car theft. They discuss changing their mode of operation to avoid capture. The plan marks a shift in their criminal career.

A thief steals Meera's bag, and she complains to Siddharth about losing her money. Feeling guilty, Siddharth and Kallis decide to mend their ways and relocate with their girlfriends to Goa. They dream of starting a restaurant and a beauty parlor there.

Chakravarthi arrives in Goa and confronts the intruders' house, then reveals he is chasing the two women who fled. Siddharth and Kallis realize Meera and Shreya are con artists who pretended to be their girlfriends to loot them. The dynamic shifts as trust breaks down.

After the Goa confrontation, they learn that Meera and Shreya have forged new identities in Delhi. The two men discover that the women are still active scammers and plan to join forces to execute a bigger heist. They reveal their new names as Madhu and Varsha.

The group agrees to team up to steal 80,000,000 rupees from Sooraj Mehta, a powerful businessman rumored to be a drug lord. The plan hinges on the women’s cover and the men's technical skills. If the women fall for them, they stay together; if not, they split the loot and part ways.

Madhu befriends Mehta during a yoga class, while Varsha targets his wife. Siddharth and Kallis prepare to break into the couple's house, combining charm with careful infiltration to bypass security.

Siddharth learns that Sooraj Mehta is a drug lord, adding danger to the heist. Despite concerns, he convinces the others to continue by proposing that they flee the country after the robbery to avoid Mehta's wrath. The tension tests their loyalties.

On the day of the heist, Varsha spends time with Mehta's wife while Madhu stays with Mehta at a guest house. Siddharth and Kallis steal Mehta's car by hacking it, then drive into Mehta's compound to access a secured locker with a 3D-printed thumbprint, from which they take the cash. Madhu fakes illness to exit Mehta's house, and the group heads toward Thailand by road to avoid airport scrutiny.

Back in Delhi, Chakravarthi searches departing vehicles but Siddharth cleverly misdirects him and escapes. The chase shows the police still on their trail, but the criminals stay one step ahead.

Chakravarthi returns to Chennai and is questioned by the Central Bureau of Investigation for going out of his way to pursue the two women. He remains silent but recalls Madhu's guile from a past encounter, explaining his obsession with capturing her.

The young lovers are shown camping on their way to Thailand, suggesting that their relationship and loyalties are still unsettled and possibly not fully honest. The journey hints at unresolved tensions between the two pairs.