After a loved-up month in South America, Cat and Sam arrive back in Glasgow. Having run away from her affair with Frankie, how will Cat deal with seeing her again? Tess has it all - new job, pad and girlfriend - but her first day at work and the arrival of a new flatmate throws up some surprises.

Still reeling, the friends each try to deal with events in their own way. When Sam starts asking questions, Frankie makes a drastic decision. Sadie and Lexy both have surprising guests. Tess enlists Ed's help with the difficult Nora, but is unprepared for the consequences.