Linus and David Larrabee are the two sons of a very wealthy family. Linus is all work -- busily running the family corporate empire with no time for a wife and family. David is all play -- technically employed in the family business but never showing up for work, spending all his time entertaining, and having been married and divorced three times. Sabrina Fairchild is the young, shy, and awkward daughter of the household chauffeur, who has been infatuated with David all her life, but whom David hardly notices till she goes away to Paris for two years and returns an elegant, sophisticated, beautiful woman. Suddenly, she finds she's captured David's attention, but just as she does so, she finds herself also falling in love with Linus, and she finds that Linus is also falling in love with her.

As a summer to remember begins in the Hamptons, new arrival Emily Thorne dazzles the members of high society by making herself known in the exclusive social circle of Grayson Global CEO Conrad Grayson and his socialite wife Victoria. But it soon becomes clear that the beguiling young philanthropist has a dark past. Emily was once known as Amanda Clarke, a young nine-year-old whose life was torn apart when her father - Grayson Global hedge fund manager David Clarke - was falsely accused of channeling money to a terrorist organization responsible for the downing of a commercial airliner. Now living under an assumed identity, she is determined to seek vengeance on the people who destroyed her father's life - the two main conspirators being Conrad and Victoria Grayson - by making their lives come crashing down around them. Because when everything you love has been stolen from you, someone has to pay.