Classmates

In the college's final year, Murali dies under mysterious circumstances, shocking his circle of friends. Raziya experiences a nervous breakdown in the wake of the death and the escalating college tensions. The incident exposes the fragile alliances and sets off a chain of betrayals that echo into the reunion years later.

Suku and Thara fall in love even as Satheeshan leads a rival faction and schemes to keep them apart. He steals Thara's letter and hides it inside the ballot box, turning a personal note into a political tool. The students' romance becomes entangled with election-time intrigues.

Pious and Suku attempt to retrieve Thara's letter from the ballot box, hoping to avert the scandal. Their efforts fail, allowing Satheeshan's manipulation to unfold. The failed plan deepens the rift between Suku and Satheeshan.

Raziya and Murali plan to elope in the generator room, seeking a private moment away from the politics. Murali does not show up, and soon the truth about his death emerges. Raziya's nervous breakdown adds to the tragedy surrounding the group.

The next day, Thara's letter is exposed publicly; Satheeshan accuses Suku of placing the letter to misuse it. Thara breaks up with Suku and a violent confrontation erupts between Suku and Satheeshan. The revelation fractures friendships and heightens campus tensions.

Murali's funeral signals a turning point as Suku decides to discontinue his studies. He moves to Mumbai to seek a fresh start and to escape the college's turmoil.

In Mumbai, Suku partners with Shantharam in the diamond business. Shantharam marries Suku to his daughter Ratna, creating new family ties and a route to stability away from his past.

After Shantharam's death, Suku takes over the diamond business, but his marriage to Ratna ends in divorce. The personal costs of his new life echo the unresolved tensions from his college days.

During the reunion in 2006, Thara explains she came to apologize to Suku for their breakup. She reveals that Satheeshan manipulated the situation and that Suku had actually been kind and honest.

Thara reunites with Suku, and he confesses that on the night of retrieving the letter he hid in the generator room and accidentally killed Murali, not Satheeshan's man. The confession reframes the past, and Suku resolves to face his consequences.

Raziya reveals she overheard the couple's plans and later visits Suku, where she strangles him with a guitar string and stages it as a suicide. She regrets the act afterwards, revealing the depth of her rage.

Suku regains consciousness and tells the police that he attempted suicide. Iyer and Lakshmi, along with Raziya, forgive him and urge him to be with Thara, ending the cycle of guilt by family support.

Suku apologizes and accepts Thara as his spouse; Thara's 15-year wait comes to an emotional end as they embrace. The family reconciles, and the couple is finally united after years of upheaval.