When they first arrived, they came quietly and stealthily as if they tip-toed into the world when we were all looking the other way. Ade loves living at the top of a tower block. From his window, he feels like he can see the whole world stretching out beneath him. His mum doesnâe(tm)t really like looking outside âe" but itâe(tm)s going outside that she hates. Sheâe(tm)s happier sleeping all day inside their tower, where itâe(tm)s safe. But one day, other tower blocks on the estate start falling down around them and strange, menacing plants begin to appear. Now their tower isnâe(tm)t safe anymore. Ade and his mum are trapped and thereâe(tm)s no way out . . .