Life in the DG is about to change as Steven Redpen arrives announcing an experiment to split the boys and girls into separate areas of the house. As the trial underway, the YP begin to enjoy their new spaces but the honeymoon period doesn't last and they soon realise it's not the same. With Redpen trying to break them up, the YP must unite together to prove that boys and girls shouldn't be separated. After an act of defiance Steven Redpen makes the move a permanent one and the YP face a home without the other half unless Redpen can be shown otherwise.

Charlie is faced with her biggest test when a visit to her grandad takes an unexpected turn.