‘I want to go on an adventure,’ says Emily’s best friend Ava. On holiday on Cornwall, the two girls go camping in a cave that long ago was used for smuggling.
But their overnight stay is interrupted by the arrival of some very unpleasant characters, and soon the girls witness a shocking crime. Things go from bad to worse when the girls are caught. When they overhear what their captors are planning,the girls know they only have one choice – they have to escape!