The closeness of Paul and Elisabeth is odd enough but it seems to deepen after their mother dies.
Inbetween the brother and sister is Paul’s friend Gerard who informs Paul that his school friend Delgado, who had thrown the snowball at him,, has been expelled. Paul idolised the boy and so in one fell swoop he has no reason to want to go back to school.
The world of the brother and sister is now controlled by the Doctor and a nurse but they are also given the chance to exit their world by going on holiday with Gerard and his wealthy uncle. On the trip they start playing the game with the role the escalate from pulling faces to stealing. Increasingly the brother and sister are moving out of control.