All murder mysteries follow a simple set of rules. Grant McAllister, a mystery writer and mathematics professor, once sat down and worked them all out.

But that was thirty years ago. Now he's living in seclusion on a quiet Mediterranean island - until Julia Hart, an ambitious young editor, knocks on his door. Grant's work is being republished, and together they must revisit those old stories.

But Julia soon realises that something's not right. Grant's stories seem to reference a real murder - one that's remained unsolved for thirty years.

Julia wants answers. But some mysteries can be murder to solve...