In Chennai, an outlaw motorcycle gang called Satan's Slaves plagues the city with drug rackets, snatch thefts, and murders, led by Naren, also known as Wolfranga, Kartikeya Gummakonda. With crime mounting beyond control, the city commissioner Vijayakumar assigns the case to ACP Arjun Kumar Ajith Kumar from Madurai, a hard-edged cop whose sense of justice is shaped by his mother Lakshmi Sumithra.
Arjun is the sole breadwinner for a crowded family: his mother Lakshmi; his older brother Kothandam, a drinking troublemaker; his married sister, and his younger brother Ashok, nicknamed Kutty Raj Aiyyappa, an unemployed graduate who is constantly looked down upon by the in-laws. Arjun is deeply worried about Kutty's future, especially when Kutty is in love with his sister-in-law's daughter.
Teaming up with his partner and friend Sophia Huma Qureshi, Arjun begins unraveling the network behind the rash of crimes. They uncover Naveen, a man found dead in a hostel; his friend Chinna betrayed the gang and supplied drugs, but Naveen burned the drugs and hanged himself. Chinna had already been killed by the biker gang. In Naveen's room, Arjun spots his helmet and realizes Naveen was a snatch thief using a stolen motorcycle bought from an online black market.
The investigation expands as the two detectives trace the bikes used in the crimes to a single online platform where stolen phones and dark-web purchases tie the operations together. A staged mercenary gambit leads them to Wolfranga, triggering a bike chase and close-quarters combat in which Arjun defeats Wolfranga and arrests the gang. The victory is tempered by a shocking reveal: Kutty had fallen under Wolfranga's influence and became entangled in the operation.
That win is undermined when Satan's Slaves ambush a police convoy, kill officers, and help Wolfranga slip away. Arjun tries again to corner Wolfranga, but Kutty betrays him in a way that complicates the case. With Arjun demoted, the case is handed to DCP Rajangam [Dinesh Prabhakar] and IG Arasu [G. M. Sundar], who are secretly aligned with Wolfranga. Lakshmi's guilt over Kutty's path drives her to withdraw at home, intensifying Arjun's resolve.
Undeterred, Arjun and Sophia rally a cybercrime unit to reopen the case. They capture a mule and learn how Kutty was indoctrinated after a humiliation from his in-laws. The gang's ideology preys on unemployed graduates who feel abandoned by society, convincing them money can fix all their problems. Kutty's perception begins to shift as Arjun's team follows the digital trail back to the source.
Wolfranga escalates his plan by kidnapping Arjun's family and demanding a metric ton of seized cocaine from the treasury to secure their release. He orders Rajangam to kill Arjun and pin the blood on Kutty, while Kutty is given an empty gun to pretend he shoots Lakshmi; yet the moment reveals Kutty's true courage as he shoots Wolfranga's girlfriend Sara Gurbani Judge instead. Kutty's act rekindles his family ties, though he and his relatives are soon captured again.
Arjun seizes the cocaine, dismantles Rajangam and Arasu's conspiracy with the remaining mules, and storms the hideout. A final confrontation with Wolfranga ends with Arjun overpowered and then guiding a coordinated takedown as the team hacks Satan's Slaves' server and lures the bikers to their base. They find Wolfranga dead and arrest the surviving members.
In the aftermath, Arjun addresses the bikers, emphasizing the enduring value of parents' love and the sacrifices families make for their children. The public cheers the police, and the department announces a rehabilitation program aimed at helping youngsters battling depression and drug use.
