Two years have passed and the once-unbreakable bond between best friends Katie, Trudi, Jessica and Siobhan has been shattered. As the girls gather it's clear their relationship has changed dramatically: there's tension in the room and no happy greetings. What could have happened to bring them to this?

Trudi is guilt-stricken, having spent the evening with Chris, and confides in Katie to seek guidance on whether she should reveal all to Richard. Katie advises her to focus on the future and forget about it, but will Trudi be able to live with her conscience?

The tension mounts as Mistresses concludes.

Trudi, Jessica, Katie and Siobhan are united in grief following the death of a loved one. However, emotions run high at the funeral and, with so many questions left unanswered, grief turns to anger and a bitter row ensues, causing a huge rift between the friends.