Based on Iain Banks' best-selling novel, Stonemouth is a romantic mystery which delves into love, loyalty and vengeance. It centres on the character of Stewart Gilmour, who returns for his best friend's funeral. Run out of Stonemouth two years earlier by girlfriend Ellie Murston's criminal family, Stewart is forced to face up to his past whilst uncovering the sinister truth behind best friend Callum's apparent suicide. Stewart resolves to find out what really happened, which means he must face the girl he left behind - Ellie.