It is the Second World War and Carrie and Nick are evacuated from London to a small town in Wales, where they are placed with strict Mr Evans and his timid mouse of a sister.
Their friend Albert is luckier, living in Druid’s Bottom with Hepzibah Green who tells wonderful stories, and the strange Mister Johnny, who speaks a language all of his own. Carrie and Nick are happy to visit Albert there, until one day when Carrie does a terrible thing – the worst thing she ever did in her life…