Chelsea's bright young things head out to New York for one big summer party. Lucy befriends fashion blogger Billie, and Louise meets native New Yorker and alpha male Alik.

Binky is getting her life back together after the revelation that she has split with Alex, but she is in for a shock when he flies out to New York to be with the gang

Having unceremoniously dispatched Alex back to Chelsea, Binky turns her attention to celebrating her birthday in style - celebrations that include a boat, a naked man and a very exciting surprise

Despite the success of his romantic date with Billie, Stevie is uneasy when Billie agrees to go on a second date with Spencer. Lucy is agitated about Billie dating both boys, and confronts her.

The rivalry between Spencer and Stevie over Billie intensifies. Love blossoms between Alik and Louise, but Rosie is reeling from the news that Jules has multiple girlfriends.

Following a glorious summer, Mark Francis hosts a little boat affair on the Hudson before the gang go home. Everything comes to a head, and it's sink or swim as the series comes to a dramatic end.