Varun Batra is the
CEO of a
Volkswagen showroom in
Mumbai and his wife, Deepti "Deepu" Batra, is a celebrity journalist. The two are a happily married couple going on seven years, but struggle to conceive a baby. Varun's sister Richa suggests the couple meet reputed fertility specialist Dr. Anand Joshi, who suggests they do
in vitro fertilisation (IVF), a fertility technique that will enhance their chances. They agree, Varun submits sperm samples, and Dr. Joshi seemingly places the couple's
embryo created in his lab in Deepti's uterus. 12 days later, Varun and Deepti are hastily summoned by Dr. Anand's wife, Dr. Sandhya Joshi, where the two run into another couple: Honey Batra and Monika "Moni" Batra, who have elected IVF as well. Anand guiltily reveals that a sperm mix-up has occurred due to the two couples
homonymous surname: Varun's sperm have been fertilised Monika's eggs, and Honey's sperm with Deepti's eggs. Shocked beyond belief, both couples attack the two doctors. The doctors suggest that the couples go for a minor procedure so there is no chance of
pregnancy. Varun later learns from Honey that Monika is pregnant with Varun's child, and Deepti is pregnant with Honey's child, but his rudeness causes Honey to fear the loss of his own child. He vows to prevent an
abortion on Deepti's part, and he and Monika rent out a flat just above Varun's and Deepti's, much to the couple's shock. Varun and Deepti initially project frustration against Honey and Monika during the first six months of pregnancy for interfering in their lives. However, during a routine check-up in the seventh month of pregnancy, Sandhya advises Deepti to try talking to Monika, who is probably going through as much as she is, being emotionally distressed. Realising that she needs to try to understand the situation, Deepti asks Monika out for a street food treat, during which they start getting to know each other. Deepti learns that Monika had suffered two
miscarriages, making her sympathise, and the women bond. However, Varun still nurses a negative attitude, especially since Deepti is not carrying his child. She takes a stand in Honey's and Monika's favour for the first time, angrily telling Varun that he never cared to understand anything that happened post the mishap. Varun, with Deepti's confrontation still fresh in his mind, makes an attempt to bond with Honey when they meet at a bar, and they almost strike a chord with each other, until Honey expresses concern over Deepti's work commitments, which he thinks will have a negative impact on the child. Varun, incensed, snubs Honey in a possessive manner, an argument between the two escalates until Varun storms out and Honey is arrested after the manager drops a call. That night, amidst heavy rains, Monika knocks on Deepti's door in desperation: she has gone into
premature labour and Honey is nowhere to be found. Varun hurriedly drives Monika to the hospital and she gives birth to Varun's child. However, the newborn is shifted to a critical unit in grave condition, having been born with a respiratory defect, accelerated by Monika's history of miscarriages, with little chance of survival. As it dawns on him that the baby is in fact his, Varun begins crying and hugs Honey when he arrives after being let off with a warning. Even as Honey and Monika reunite, he goes home and breaks down in Deepti's arms, apologising for his past insensitivity. For a few weeks, both couples pray for the baby's recovery and Monika remains in the hospital as Deepti tends to her. The baby finally recovers and after 2 months, Deepti too has a successful delivery. Varun, now a changed man, invites Honey and Monika to meet the baby. Both couples finally bond and accept each other, holding each other's babies in their arms. ==Cast==