Stewart Gilmour arrives home in Stonemouth after two years in exile. Sad circumstances bring him back: his best friend has died, apparently at his own hands. Convinced it can't be suicide, Stewart resolves to find out what really happened, which means he must face the girl he left behind.

Stewart persuades Ellie to help find out what happened to Cal. But the mystery has far from played out - they have to race to prevent further fall out amongst the Murston clan.