John Taylor lives in quiet solitude, designing puzzles for a living, under the nom-de-plume of 'Ludwig'. When his identical twin, James, disappears off the face of the earth, John takes over his brother's identity in a quest to discover his whereabouts.
A portrait into the mind of a dry-witted, sexual, angry, porn-watching, grief-riddled woman, trying to make sense of the world. As she hurls herself headlong at modern living, Fleabag is thrown roughly up against the walls of contemporary London, with all its frenetic energy, late nights, and bright lights.