Why? Oh!!

Matt comes home for his baby sister, Karen's wedding with his girlfriend, Suzzane, and finds Allison, his high school love, or his elders brothers ex- wife and a mother of his families first heir, at the party.

Not only that, not one member of his family holds any grudge against her apart from him.
Infact, he finds them doting on her on occasions.
He hates her not only for ditching him and going to marry his brother for his money, divorcing him only two years later, but also for taking away Caddie, his brothers son.

What he couldnt understand was why no one fought for the custody of the child. Now he vows to find out the reasons behind the love that his family gives her.