When an explosion rips through the chemistry lab at Dublins Ravens Hill School and six girls are injured, the first thought is that its an experiment gone wrong. Then the Gardai start investigating and declare it a potential bomb attack. But if so who was it targeting, and why?

Ella, Becky, Maeve and Mackenzie are rushed to hospital, along with the injured Frankie and Sorcha, who team up with Jess to figure out what actually happened. But what they discover is something more sinister than even they could have imagined