Naani

Eight-year-old Naani creates trouble around the house, testing his mother's patience. She scolds him for things like eating toothpaste and wetting the bed. The domestic friction sets the tone for his impulsive nature.

While wandering after his mischief, Naani falls on the road and is helped by a compassionate young woman. He feels a moment of kindness from a stranger who notices him. The encounter hints at a life-changing support system he will encounter again later.

Naani's elder brother plans to watch a movie with friends, but the boy is not allowed to join. In anger, Naani cuts power at home, causing a short circuit. His mother scolds him and he runs away toward the river, where he is drawn into a perilous moment that ends with help from a stranger.

An old man reveals himself as a scientist with a private laboratory. He uses his experiments to transform Naani physically into a young adult, while Naani's mind remains that of a child. Naani agrees to stay and assist in the research, beginning a strange new life.

Naani, still mentally a child, meets a girl named Priya in a park whom he had helped earlier. He removes dust from her eyes and smiles, catching her attention. Priya becomes curious about this enigmatic stranger who seems older than he appears.

Naani goes for a job interview at a toy manufacturing company. The owner wants someone who can think like a child to design children's toys, and Naani fits perfectly. The daughter of the owner, Priya, appears to be in charge and welcomes him into the company.

Naani, now living a double life, meets his brother dressed as a stranger and learns that their mother is depressed over Naani's disappearance. The revelation deepens his sense of responsibility toward his family and pushes him to face his home life soon.

Naani visits his ailing mother and witnesses the toll his absence has taken. He asks the scientist to revert him back to his original form, and the scientist agrees. The reconciliation with his mother begins as the plan to reverse moves forward.

That very night, the scientist completes the transformation back into a young man. The scientist is shocked to see the childlike boy now inhabiting the adult body. Naani accepts the new reality but keeps it concealed from the world.

Naani's daytime identity remains a child while his nighttime form is a grown man. Priya begins expressing her love, complicating Naani's choices. The scientist advises Vichu to accept Priya’s feelings and move forward.

Priya asks Naani to accompany her to a matinee, but he cannot appear in his child form. His mother befriends Priya, and Priya starts to like Naani through the growing family bond. The day deepens the ties between them.

On the day Priya is to marry Vichu, Raj's men kidnap him. In a swift turn, Naani's mind takes control and becomes Vichu, allowing the marriage to proceed in the evening. The lines between his two identities blur under pressure.

Priya becomes pregnant, unaware of the true parentage given the confusion of forms. Naani reveals the truth to Priya, shocking her and forcing her to confront an impossible reality. The revelation disrupts their budding family life.

Priya goes into labor and they rush to the hospital. Raj's men create danger on the way, but Vichu fights them off. The truth about Naani and Priya is revealed as their baby is born, cementing their unconventional family.

Twenty years pass and Naani is now twenty-eight, living as Priya's husband. In a final twist, he returns to his own body as a 48-year-old Vichu, now the father of a twenty-year-old son. The dual life ends with a surprising closure.