sentences:  In this way they are able to organise a full escape when predictions of a tidal wave that will collapse the mine reaches them.After the escape, Is Underground is captured and left to die in the derelict library by her Uncle Roy but with the help of her new friends escapes in time to see the Playland Express taking children back to London and Uncle Roy killed when he runs in front of it.She is left with the ability to mentally talk to her friends all over the country, and with a new companion is Arun, who has recovered from his breakdown.