Stewart arrives home in Stonemouth after two years in exile. His best friend has killed himself but he is convinced that this can't be true. Stewart resolves to find out what really happened, which means he must face the girl he left behind.

Stewart persuades Ellie to help him uncover the mysterious circumstances lying behind Callum's death. It seems the mystery has far from played out, as the pair race against the clock to try and prevent further fall out amongst the Murston clan.