The girls settle into their new lives in London. Birdy continues to date Nathan. As things between them start to get serious, Maggie realises that Birdy is starting to slip away.

Maggie decides to ‘grow-up’ by focusing on work and swearing off sex and booze. Driving everyone mad with her new ‘grown-up’ behaviour, events come to a head at the Heirs & Graces.

Maggie and Birdy seek to rekindle their closeness with makeovers, baking cookies and trips down memory lane, only for tensions to finally explode in a big way.