Dil Kabaddi tackles the journey of two modern day couples in urban India, Samit and Mita & Rishi and Simi.
While Samit is indeed proud of his philandering and thoroughly enjoys the adventure and experimentation, Mita is at receiving end of his adulterous ways. His pride along with her suffering defines their relationship. On the other hand, as Rishi tries really hard to walk that extra mile and get rid of his monogamy, Simi struggles to decide whether she is really cut out for something outside of marriage or not. His desperation coupled with her confusion, decide the dynamics of this relationship.
As the four saddle their Way on the marital marathon, they come across Kaya, who spices up the goings-on between Samit and Mita; Raga, who gives Rishi the motivation to take the next step; and Veer who ends up for a short stint with Mita, and becomes the sole reason for Simi's confusion.
How the quartet handles these complex, sensitive matters of the heart, and how they solve the never ending quests which their hearts put them through, with some ending up with a broken heart, is essentially the crux of the plot of Dil Kabbadi.