Once, Rajeev and Jhanvi were talking on the phone while the latter is driving. Because of this, Jhanvi didn't see a pedestrian in front of her car and immediately turned her car as she noticed him. The pedestrian survived, but Jhanvi accidentally hit another car, resulting in both her and the driver of the other car's deaths.
One year later
Rajeev has lost interest in his life due to Jhanvi's death. A new Punjabi senior manager named Daljeet Bagga who had lost her husband, Ravinder, in a car accident, joins his bank. Rajeev makes a terrible first impression on Daljeet while welcoming her. As Daljeet humiliates him in front of everyone, they take a disliking to each other. Rajeev sympathizes with her as it is revealed that Shakti, Ravinder's selfish and evil younger brother, is trying to gain custody of Daljeet's children Balwinder "Barry" and Twinkle since they are the heirs to Ravinder's property. Rajeev learns that Daljeet's husband was the other person who died in Jhanvi's accident. Shocked and guilt-ridden, he marries Daljeet to protect her children. She wins Barry and Twinkle's custody but Rajeev's family opposes Rajeev and Daljeet's relationship, unaware that their marriage is only a fake contract. Rishabh and Barry become great rivals. Shakti repeatedly attempts to separate Rajeev and Daljeet but fails. Daljeet eventually makes a place for herself in the Bansal family and is accepted by everyone except Rajeev's children.
Barry initially hated Rajeev and cared about Shakti, but Shakti's true colors are revealed. Barry then starts liking Rajeev and later accepts him as his father to Rishabh's dismay. Rishabh refuses to see Daljeet as his mother and hates her as he believes that she is trying to replace Jhanvi and snatch his father from him. Daljeet stands up for Trishala against Rajeev and supports her despite facing humiliation, so Trishala realizes Daljeet's love for her and accepts her as her mother.
Daljeet falls in love with Rajeev and eventually confesses her love to Rajeev who continues living by Jhanvi's memories and thus refuses to accept Daljeet's feelings. Daljeet feels heartbroken but hides the pain. Shortly thereafter, Shakti exposes the contractual basis of Rajeev and Daljeet's marriage to their family which shocks them, but they remain supportive. Shakti again tries to gain custody of Barry and Twinkle, but his true intentions are exposed by Rajeev. Daljeet wins the case but her marriage with Rajeev is annulled. Both of them are disheartened by the annulment, with Rajeev unexpectedly falling in love with her but not realizing his feelings. Rishabh plots to humiliate Daljeet by spiking her drink at a party but repents when she discovers his plans but still defends him. Rishabh eventually accepts her as his mother.
Daljeet finds out that Jhanvi was responsible for her husband's death. Betrayed, she refuses to forgive Rajeev for hiding this and ignores his sincere attempts to apologize. Meanwhile, Rishabh is bullied by seniors at college. Barry defends him and thrashes the seniors along with Rishabh. Barry and Rishabh develop a mutual understanding and finally become friends. In a twist of events, Daljeet is in an accident planned by Shakti for revenge. Shakti tries to kill Daljeet in the hospital by cutting her oxygen supply. A devastated Rajeev rushes to the hospital, hugs Daljeet, and bursts into tears. Miraculously, she opens her eyes and later makes a full recovery. The fear of losing Daljeet makes Rajeev realize his love for her. Daljeet forgives Rajeev after witnessing his repentance and learning about how he cared for her in the hospital. Rajeev musters up the courage and confesses his love to Daljeet, who is overjoyed as she hugs him and accepts his heartfelt proposal. Though they encounter several obstacles, they eventually get married in a grand ceremony.
Barry suffers a severe head injury in a fight with Rishabh and loses his memory of the previous year, including Rajeev and Daljeet's marriage. He becomes the angry young man he was a year ago and starts disliking Rajeev again because of his closeness to Daljeet, which forces Rajeev and Daljeet to hide that their marriage. Rajeev learns the truth behind Barry's accident and cuts all ties with Rishabh but is eventually convinced by Daljeet to forgive him after he witnesses Rishabh's care towards Barry and his repentance towards his mistake. Meanwhile, Shakti returns and forces Daljeet to give him all her properties by threatening to reveal to Barry her marriage with Rajeev. However, Barry catches Shakti forcing a helpless Daljeet and furiously tears the property papers, making a humiliated Shakti leave.
Ravinder, Daljeet's husband who was thought to be dead, turns out to be alive and returns for Daljeet. Heartbroken that Daljeet has remarried, Ravinder decides to leave forever for her happiness, but his identity is accidentally revealed. Ravinder restores Barry's memories of the previous year and Rajeev and Daljeet's marriage by recreating a past situation, after which Rishabh and Barry reconcile. As a shocked Daljeet finds herself having to choose between Rajeev and Ravinder, an equally shocked Rajeev consoles her and promises to accept her decision no matter who she chooses. Ravinder, who fears losing Daljeet and is manipulated by Shakti, plots to get her back. Rajeev is shocked when he learns about Ravinder's selfish motives but doesn't expose him. Rajeev further sacrifices his love for Daljeet and tries to make her choose Ravinder by faking a critical illness, but Daljeet eventually learns the truth. Enraged, she confronts Rajeev and confesses that she would die without him, and they embrace. Ravinder realizes his mistake and apologizes to Rajeev. Shakti, infuriated that his plan failed, shoots at Rajeev, but Ravinder gets shot while saving him. Ravinder shoots Shakti in retaliation and kills him. Before dying himself, Ravinder asks Rajeev to take care of Daljeet.
