Elm Heath Children's Services is doing its best: Al is worrying about the homophobic abuse of some gay parents while Nitin is throwing up everywhere having accidentally put his arse up on Instagram. Rose is still fretting about the fall-out from the teacher-pupil relationship at Glenway, and Nat has brought handcuffs into work (don't ask). Everyone is entirely unaware that one of them is about to be taken hostage by a violent man with two children in care, a personal grudge against Rose, and a full bladder. A curry is called for.