The mystery surrounding Grace's disappearance and the connection with Adam intensifies. Midge explores her past further. Lucy announces she has split from Bob. Nicole is thrown by an encounter with her estranged father. Sid and Rock appear to grow closer.
Nicole considers the idea of giving love a chance. Sid and Simon find things awkward between them. Midge's first love officially joins the firm, and the continued search for Grace leads the girls to an unlikely place.
Sid has to decide whether to go through with the plan to rip off Hartmann Payne. Grace is still missing and the girls are worried about her safety.
When Grace's boss Rock proposes, her life begins to unravel in a most unexpected way.