The explosive revelation at Christmas that Spencer cheated on Louise still has tempers running high. Spencer and Louise return from a long break in the sunshine, during which it seems they have got their relationship back on track, but their welcome home may not be what the pair were expecting. Jamie and Proudlock have agreed to move in with Francis, instead of the original plan of moving in with Spencer. And, while Spencer is left feeling rejected by the boys, Millie and Rosie make it clear to Louise that they are not happy about her rekindled romance with him. But while these friendships and relationships are falling apart, a new romance has begun: Ollie Locke has fallen for Ashley, much to the bewilderment of her old flame Francis.

Spencer is still smarting from having lost out to Francis in his bid to live with Jamie and Proudlock. Andy has arranged a surprise ski trip to Verbier, inviting new girls Fran, Olivia and Phoebe along with a few select others. The mix is risky and it's not long before sparks fly. And there's more trouble on the slopes when Francis lets a secret slip that Jamie has been keen to hide from everyone. Back in Chelsea, Cheska, Ashley and Ollie have noticed that Binky is spending less time with them since making an unexpected new friend.

Fashion Week has descended upon the capital and the Chelsea set have front row seats to all the must-see shows. What better excuse than to pop the champagne cork and party? Spencer and Louise's relationship is still uncertain, and having spent some time apart they have come to a conclusion. Jamie is enjoying being in love, but will a revelation by Lucy rock the boat? While doing a little spring cleaning in Ollie's flat, Ashley stumbles across an X-rated DVD...

Lucy is frustrated when she finds out that Jamie has a girlfriend. Spurred on by Binky's mum, she decides to confront him. Ashley arranges a lunch to get to know Ollie's best friend Oscar and, despite Spencer and Louise's break-up, relations are still strained. Just as it appears that most relationships in Chelsea are falling apart, a trip to the country sparks a new romance.

After their dramatic break-up, Spencer and Louise have both decided it's time to move on. However, as is often the case in Chelsea, it's complicated and with new love interests come more complex relationship tangles. Meanwhile, Ollie and Ashley have to face up to some home truths about their relationship.

Spencer whisks Lucy away on a romantic date, while Andy takes Louise bowling. Jamie, Josh, Proudlock and Spencer get revved up for a day at a car test track and Josh takes the opportunity to air his grievances to Proudlock. Meanwhile, Mark's first magazine deadline looms, so he enlists Binky to star in a lavish photo shoot.

It's games in the garden, country dancing and bunting ahoy as Binky and her mum host a barn dance, but what drama will unfold in the country? Romance is in the air as Louise and Andy get closer, but is Louise really over Spencer? And while Lucy and Spencer continue to hang out, how does Jamie feel about his best mate keeping company with the girl he hates most in Chelsea? Meanwhile, Proudlock spends some quality time with Phoebe, and Ollie and Ashley face up to the problems in their relationship.

As things seem to have cooled off between Lucy and Spencer, Lucy embraces her new single status with a night out that sparks romance with a handsome stranger. Following her split from Proudlock, Phoebe opens up to Jamie about her past tumultuous relationship. Despite Andy's concern that Louise has unresolved anger towards Spencer, he becomes increasingly smitten with her. Meanwhile, Lucy - still at loggerheads with Louise - tells Andy that Louise isn't welcome at her housewarming party.

Tensions run high in Chelsea after Lucy's eventful pubwarming party... Jamie and Proudlock are worried about Spencer, while Phoebe is reeling about a situation with her ex-boyfriend. Alex and Jamie decide it's time to come clean about a few home truths, and Ollie has a surprise reunion with ex-girlfriend Ashley that causes some fireworks.

Having spent a week away from it all in Barcelona, Spencer has asked Jamie to bring a group of friends out to join him. Back in Chelsea, with Olivia and Phoebe also away in Spain, Binky decides to take Fran under her wing and arranges an evening out with some well-known, but unlikely, suitors. Meanwhile, Francis and Proudlock make it their mission to get fit by joining a local running club, and it's not long before someone catches their eye.

The series finale sees Louise returns to Chelsea after graduating from university and arrives back in the arms of a very happy Andy, but, out of the blue, a revelation rocks Andy's world. Meanwhile, Spencer and Lucy seem to be going from strength to strength, but how will Louise's news affect Spencer? And Oscar finally plucks up the courage to ask Fran out on a date, but there's one big obstacle in the way.