Two families, the Sharmas and the Jindals live in a two-story mansion in Punjabi Bagh, whose ownership is claimed by both and are constantly at loggerheads. Mystery revolves around the mansion where an abandoned locked room is said to be haunted. The ghost, Chandraprabha, is a look-alike of her great-granddaughter, Connaught Place Sharma, known as CP.
In the midst of all the unlikely events happening in the mansion, Jitendra Jamvant Jindal, known as JiJaJi, plans to acquire the entire mansion by marrying CP but his plans often backfire because Chandraprabha does not want him and CP to bond. Despite her relentless efforts to keep Jitendra separated from CP, Jitendra starts falling for CP when she saves his life every time Chandraprabha tries to kill him. CP too starts falling for Jitendra seeing his caring and affectionate attitude towards her.
Jitendra decides to face the ghost himself to save the two families and his love, CP. Jitendra weakens Chandraprabha using Jaldiram and Jamwant's college friend/crush Mayuri's enchanted powder and nail such that she remains entrapped in the abandoned room. However, before Jitendra leaves, Chandraprabha narrates to him how she killed her husband, Yuvraj, and then killed herself, by jumping into the well because of the curse of the bangle. She also tells Jitendra that all daughters born in the family are bound by the same curse. Thus, Chandraprabha convinces Jitendra that whatever happened with her is also bound to happen with CP and asks him to keep CP away from marriage. In reality, Chandraprabha made up the story. Chandraprabha also warns Jitendra that if he discloses the curse to CP then the curse will affect her immediately. Jitendra having fallen truly and deeply in love with CP promises Chandraprabha that he will never marry CP nor allow her to marry anyone else to protect her from the curse.
Later, when Jitendra tries to distance himself from CP, the latter tries to woo him using all possible means. Soon, Jitendra falls prey to one of CP's plans and lets out that he too loves her but he disagrees to marry her. CP concludes that after overpowering the ghost, Jitendra's behaviour and affection towards her has changed. CP decides to learn the reason for Jitendra's changed behaviour, so, she dresses up as Chandraprabha and makes Jitendra reveal the truth about the curse.
After learning the truth, CP challenges Chandraprabha that hers and Jitendra's love is so strong that they can overcome any curse. CP soon learns that the person who has a symbol of a peacock on his/her body can remove the curse. She starts hunting for that person and it turns out to be her father, Jaldiram. It is also revealed that Chandraprabha too has her own selfish motives. In reality there was no curse. She wants to become immortal and the most powerful by entering CP's body and by possessing all evil forces. She had to sacrifice the most precious thing to her. Hence she sacrificed her husband and killed herself.
In the end, when Chandraprabha tries to use Jaldiram to win her intentions. Jitendra reaches there on time, saves Jaldiram and foils Chandraprabha's plans. Later, he overpowers her and pushes her into the haunted well. Both the families and Jaldiram appreciate Jitendra's heroism. Then, Jitendra proposes to CP and is accepted by both families.
In the final scene Chandraprabha leaves a suspense by saying, "Hum wapis aayenge"(I will be back)
