A couple of years have passed and the once impenetrable bond between best friends Katie, Trudi, Jessica and Siobhan has been shattered.
Katie finds herself taking a trip down memory lane when she pays a visit to the house when her interfering mother, Vivienne, announces that she's planning to sell the property. Katie ends up uncovering a secret which could ruin her childhood memories. Trudi is still finding it hard to to juggle her successful cake-making business and home life. Jessica looks forward to starting her IVF treatment despite the cost.
Trudi feels guilty after having evening with Chris and ends up telling Katie as she she wonders whether she should tell Richard what happened. Siobhan goes out on a date with Jeff after she realises that Dominic has moved on with his life. Dominic feels jealous and he ends up making a pass at Siobhan, but he later realises that it would be better is they just distance one another further. Jessica and Mark's money problems continue to drive them apart. When Katie realises that she and Richard are becoming too close she makes it clear that she wants nothing more to do with him.
Trudi, Jessica, Katie and Siobhan find themselves united in their grief following the death of a somebody they were all close to. Grief turns to anger at the funeral though as there are many unanswered questions. The friends don't speak for a couple of months but a heartbreaking announcement ends up bringing them back together. Siobhan becomes confused about her feelings for her new boyfriend, Jeff. Trudi is in a panic after Amy disappears.