From now on,' Ruby says to her friend, the unnamed narrator, 'we?re going on the Stone Age diet. It means we only eat the sort of healthy things our ancestors would have eaten.' An admirable plan, but Ruby never eats and the narrator?s attention span doesn?t lend itself to routine. He?s too busy pining for his ex-girlfriend, who broke up with him and left him nothing but self-pity and a plant: an Aphrodite Cactus. From renowned British author Martin Millar comes a fantastical, suprising and sobering story of the raw friendship shared by two Londoners.'