Rishiraj and Priyadarshini are childhood friends, who fell in love with each other in their youth. They were separated after an accident where Priyadarshini lost her parents.
After 20 years
Priyadarshini has become a tourist guide under the name Pihu Mitra, while Rishiraj, now an industrialist, has renamed himself Rishi Sen. Rishi has adopted Pihu's elder sister, Sudorshini (now known as Rusha) as his own sister. Rishi and Pihu meet in North Bengal, but do not recognize each other. Rishi's family, however, takes an immediate liking to Pihu because of her kind heart and cheerful nature. Pihu's uncle, Anushka's father, becomes seriously ill, but the family cannot afford proper treatment. Around the same time, Pihu loses her job and is left helpless. Rusha offers Pihu a position in Rishi's office, though Rishi is adamantly opposed to employing women. Rusha eventually convinces him. Pihu gets the job and moves into Rishi's home.
Rusha's husband, Soumen, secretly plots to take over Rishi's business and property. He goes to a hotel to smuggle drugs for money, but Pihu catches him. When the media covers the incident, they falsely blame Pihu. To protect her, Rusha demands that Rishi marry Pihu. Rishi and Pihu are forcibly married, but privately agree on a contract stating that they will remain married for only six months. They travel to Bristibari, where Soumen hires goons to kill Rishi, but Pihu saves him. Gradually, Rishi and Pihu begin to trust each other and face numerous challenges together. Later, during a family picnic, Rittik and Soumi try to bring them closer by mixing alcohol into their drinks. While intoxicated, Rishi and Pihu reveal their true identities to each other, and the confession is recorded on Pihu's phone.
Back home, after several days of confusion, Pihu finally tells Rishi that he is her childhood love, Tubai Da. She becomes emotional and goes to his office to tell him she is Priyadarshini. However, before she can speak, Rishi's business partner arrives and demands that Rishi marry his daughter, Priyanka, who loves him. The partner threatens to reclaim all the money he invested, which would cost Rishi his home, business, and everything he owns. Rishi is torn, as he has developed feelings for Pihu. Pihu vows to arrange Rishi and Priyanka's marriage within a month. Priyanka moves into Rishi's home and tries to grow close to him, but he ignores her. Pihu and Rishi expose Soumen's schemes to the family, and Soumen is arrested. Rusha then discovers she is pregnant.
Time passes. Anushka and Rittik fall in love, but Anushka's father arranges her marriage to the son of a friend, who turns out to be a fraud. On the wedding day, Pihu and Rishi reveal the truth, and Anushka marries Rittik instead. On Valentine's Day, the family hosts a large party, where Rishi confesses his love for Pihu and proposes to her. Priyanka pressures the family to force a divorce between Rishi and Pihu. Pihu devises a plan: she signs fake documents instead of the divorce papers, but Rishi does not notice and misunderstands her actions. When the deadline to repay Priyanka's father arrives, the family cannot gather the required funds, and Rishi reluctantly prepares to marry Priyanka. Meanwhile, Pihu records Priyanka's incriminating phone call and blackmails her. She breaks into Priyanka's father's mansion to obtain evidence but is attacked and left unconscious in a bathtub full of water. Rishi, worried for Pihu, searches for her and saves her. With the evidence secured, the wedding is postponed. Distraught, Priyanka attempts suicide and is struck by a car driven by Rishi's grandmother and cousin Uday. Uday falls in love with Priyanka, and they marry that night.
At the wedding ceremony, Rusha's new friend Mayuk appears. Shortly afterward, Pihu leaves the house, hurt by Rishi's misunderstanding over the fake divorce papers. Rishi discovers they were not divorce papers at all and realizes his mistake. He accepts that Pihu is truly Priyadarshini. At the Holi festival, Rishi and Pihu finally confirm their identities to each other and reconcile. Monika Sur, Rishi's father's former assistant and Soumen's sister, returns and frees Soumen from jail. The Sen family prepares for Rishi and Pihu's grand wedding. However, on the wedding day, Rishi's mother returns with a woman claiming to be the real Priyadarshini—a woman who cared for Rishi for many years. Unaware of the deception, Rishi's mother believes her. The impostor is actually Monika Sur's daughter. She convinces the family she is genuine, and Rishi and Pihu's marriage is called off. Rishi again misunderstands Pihu.
Soon, the truth emerges: Pihu is the real Priyadarshini. Rishi and Pihu reunite. But Monika tells Pihu that Rishi's father murdered her parents and that Rishi concealed the truth. She gives Pihu a gun and urges her to kill Rishi. Devastated, Pihu confronts Rishi and attempts to take her own life. Soumen, shocked, shoots at Rishi, but the bullet grazes Pihu instead, and she collapses. Rishi saves her. It is then revealed that Rishi's father, Apritim Sen Sharma, is alive—and innocent. The true culprit was Monika. Rishi's uncle is injured in a bar incident, is mistakenly believed dead, and Rishi is accused and arrested, but Pihu saves him. All complications are resolved, the family reunites, and Rishi and Pihu remarry. Rusha also learns that Pihu is her long-lost sister.
Later, the son of Apritim and Monika returns, intending to kill Rishi and marry Pihu. Rishi, Pihu, Rittik, and Anushka go on a honeymoon arranged by their grandmother, but Rohan (Apritim and Monika's son) changes the destination and brings them to an abandoned house. There, Rohan kills Rishi and pushes him into a river. The family believes Rishi is dead. Four months pass. Pihu, now a renowned tourist guide, goes on a trip when her bus is stopped by goons. Their leader, Romio, looks exactly like Rishi. Shocked, Pihu escapes. Convinced there is a mystery, she searches the village but finds nothing. The Sen family pressures Pihu to marry Rohan. She refuses, and Rohan hires Romio to impersonate Rishi.
In the final confrontation, Rohan captures Pihu and Rusha, but Rishi—alive—rescues them. Pihu asks Romio whether he is truly her Tubai Da. Romio replies that whether he is or is not will not be revealed in this season. [5]
