Majunu

Vasanth and Heena rush to save a baby on a railway track in Chennai, narrowly averting disaster. In the chaos and relief, they exchange glances and feel an unexpected spark between them. The incident marks the first hint of a growing attraction amid danger.

The pair cross paths again at their college, where Heena reveals she is a Bengali exchange student. Vasanth learns more about her background and her family ties. A budding romance begins to take root against the backdrop of campus life.

Terrorists plot an explosion to kill MP Gajapathy during a public gathering, setting the larger danger in motion. The impending attack places Heena under suspicion as investigators scramble to connect the dots. Security measures tighten and the clock ticks toward disaster.

Heena's jokey warning about a bomb on her watch at the bookshop backfires when trouble erupts near the gathering. The shopkeeper and authorities interpret her joke as evidence against her, tightening the noose around her. She becomes the prime suspect as the investigation begins.

The public meeting is hit by a bomb and Gajapathy is wounded, while Heena escapes as the charges mount against her. Vasanth accidentally encounters one of the terrorists and uncovers bombs in his bags. The terrorist kills himself with poison once police close in.

Vasanth accidentally knocks down a terrorist, discovering bombs in his bags and triggering a pursuit. When the police close in, the bomber commits suicide by poison. This moment shifts the investigation but leaves Heena's fate unresolved.

Heena hides in Vasanth's palatial house, and he helps her stay safe in secret without his parents knowing. She denies the charges against her, while he pledges to protect her and eventually helps her get back to Kolkata. Their bond deepens as danger continues to loom.

During a cyclone, Vasanth takes Heena to the railway station and sends her home to Kolkata, hoping to keep them apart for safety. He stays behind to shield her from further peril, while she returns to her mother and brother's care. The separation tests their fledgling love.

A week later, Vasanth lies to his parents that he is going for a vacation computer course in Mumbai and leaves for Kolkata with his friend Ganesh to find Heena. He searches through several colleges, finally locating her and bringing hope for a reunion. The reunion re-ignites their bond, setting the stage for confronting Heena's family secrets.

On reuniting, Heena introduces Vasanth to her mother, and the revelation that her brother is the mastermind behind the plot shocks the family. Heena's mother openly disapproves of their relationship, creating tension and risk for their future. The couple's resolve is tested, but their feelings remain strong.

Heena learns the true identity and motives of her brother, and fears he may use violence to reach them. To protect Vasanth, she pretends to reject him, causing heartbreak for both of them. The deception buys time but increases the emotional stakes.

Realizing the danger to his son, Gajapathy travels to Kolkata and confronts the situation, joining Heena in trying to save Vasanth. Heena's brother discovers their arrival and escalates the chase. The family moves toward a dangerous confrontation.

Heena finally confesses her love and explains her brother's true manipulation, shocking her mother. The lovers sprint toward safety by boarding a running train, a desperate dash that buys them time but tightens the peril. Their bond is sealed by courage and trust.

The police arrest Heena's brother, foiling his plans, and the couple is left free to pursue a life together. The film ends with Vasanth and Heena united, having overcome danger and family opposition. A sense of hopeful closure settles over their cross-cultural romance.