Thomas and Anya mask their disappointment when Carl tells them that they're going to stay with their aunt for a while. When he drops them off at the bus stop for their first day at school, they decide to skive off. Later, Chas informs Carl that she saw the children hanging around the factory. Later that night, Thomas panics as Anya's rash begins to spread. Carl's alarmed to see Thomas has the rash, too, and races them to hospital. The doctors are concerned by their symptoms and as the nurse leads them to an isolated ward, they're warned that their suspected disease is highly contagious and dangerous. Maisie's recklessness takes another turn when she lets a stranger take her home, and John worries about the health of his animals after another of his lambs dies.