Socha Na Tha is the story of a boy who runs away to marry the girl where everyone was forcing him to get married to the strange girl.
Mr. Oberoi is a wealthy industrialist, and lives a comfortable lifestyle, with this two sons. The elder is married, and he would the second one, Viren, to also marry. He has already selected a bride for him in the shape and form of Aditi Malhotra. Vjren has always lived in his father and brother's shadows, he is romantically inclined, and hopes to fall in love first and then marry the girl of his choice.
The presence of Aditi prevents this, and he makes all attempts to not marry her. He succeeds, the wedding arrangements are all called off. Then he meets the girl of his dreams, Karen Fernandes, and proposes marriage to her. The only setback he sees that she Catholic, and he is Hindu, but that is soon overcome.
Everything seems to go on smoothly between the Fernandes and Oberoi families, when Viren falls out of love with Karen, and wants to cancel the wedding. When questioned about his change in mind, he responds that he is in love with Aditi. But Aditi will not have anything to do with him anymore, for she is getting engaged to a childhood friend, Mahesh, and she very forthrightly tells Viren to his face that she will only marry Mahesh and no one else. How will Karen react to Viren's change of mind? Will Viren change his mind again, or will he fall in love with a third female?