Everybody is talking about Jamie's infidelity just a week after he made a public display his affection for Lucy. Lucy is not happy and this could this be the end of their relationship and even their friendship. Alex and Binky are closer than ever following a romantic break in Goa. Spencer is about to drop a bombshell that will test their relationship to the limit though.
Rumours about Alex's infidelity are still rife around Chelsea. Binky might believe his denials, but Cheska and Fran are determined to discover the truth by quizzing Stevie. Spencer and Jamie enjoy a boys' night out, which ends up being interrupted by Emma Miller, who Spencer used to be infatuated with.
London Fashion Week gets underway and Mark Francis, Binky and Louise have front row seats. Spencer's got his eye on the models especially one called Emma. Binky sets up Louise with Alex's best friend Robbo.
Binky is left feeling stunned following Cheska's confirmation about Alex's infidelity and flies out to New York. Alex is not sure what to do, but Jamie tells him what his course of action should be. Spencer's plan to introduce his new girlfriend Emma to his ex does not go to plan after Louise offers Emma some home truths about his past.
Binky is feeling really upset as she attempts to deal with the news that Alex cheated on her. Stephanie and her friend Erik visit Venice and Erik has invited Spencer to join them, along with Lucy, Stephanie and Louise and his new girlfriend Emma. Stevie takes Riley out on a date.
Binky's efforts to stay away from Alex have failed and Alex attempts prove that he's a changed man. It is Team Lucy versus Team Louise on the netball court. Lucy tells Binky something that threatens to ruin her reconciliation with Alex.
The band Peace play a gig in honour of Louise's birthday, but things end up being anything but peaceful. Binky grows close to Alex again whilst a clear divide forms between the girls. Lucy is being frozen out causing Spencer to have an attack of conscience.
Binky struggles when she learns about Alex continuing to cheat on her. Alex and Louise are both mad at Spencer and confront him. Stephanie and Stevie's relationship becomes a subject of gossip when they kiss. Mark Francis and Rosie go car shopping.
Spencer tries making amends with Binky after the eventful picnic. Binky's best friends feel as though she's isolating herself from them. Jamie has set his sights on Riley, but he's afraid the fact she works for Lucy will cause issues. Stevie and Stephanie continue seeing one another.
Jamie's love life is the talk of the town and Lucy isn't happy to learn about his involvement with former intern Riley. Mark admits his feelings for Lucy have never gone away. Mark Francis takes Binky to Longleat with Sophie and Victoria in an effort to lift her spirits.
Binky and Alex are determined to work things out on their own. Stephanie leaves a heartbroken Stevie to return America as everyone else heads to Andy's epic country house party.