One fateful summer morning in 1986, two 11-year-old girls meet for the first time and by the end of the day are charged with murder.

Twenty-five years later, journalist Kirsty Lindsay is reporting on a series of attacks on young female tourists in a seaside town when her investigation leads her to interview funfair cleaner Amber Gordon. For Kirsty and Amber, it's the first time they've seen each other since that dark day when they were just children. But with new lives – and families – to protect, will they really be able to keep their secret hidden?