The Aachi Mess boys are all grown up and running their restaurant successfully in Koyambedu Market. Thillai is released from jail and comes across the four boys.

Desperate for girlfriends, Kuttymani and Settu try to talk to a pretty girl using a unique method, which ends in a disaster. Meanwhile, Urundai is on the hunt for a mysterious bag.

Urundai meets Ravi to talk about the mysterious bag. Inspired by a little tea seller, the boys launch a mobile restaurant in the new market. Ravi finds Thillai, shocking Maran.

The boys await Mayil's return with the key to Aachi Mess. A murder rocks Thillai's water factory. Conflict erupts when Urundai hides his man from cops in the mobile restaurant.

Mayil finally knows the truth behind his arrest. Bhargavi advises Ravi on how to recover Benz's bag. Urundai's father finds the Aachi Mess receipt in Benz's belongings.

Twelve years ago, encounter specialist Samidurai was assigned to kill Ravi. Janaki learns that Maran knows Thillai. What happens when Aachi's boys refuse to give the bag to Benz?

The Aachi Mess boys fight to get back their van. The fight for the bag grows intense as Pilot also gets kidnapped.

Naidu finds shocking evidence in the bag. Mayil meets Ravi with a hidden agenda. Thillai visits Janaki to reveal what happened to her father.

Fuming over Naidu's murder, the Aachi Mess boys and girls decide to kidnap Ravi. Meanwhile, Janaki gets crucial evidence about her father's death from an unlikely source.