The protagonist of this play is a single woman nicknamed "Fleabag" (Phoebe Waller-Bridge), and the story revolves around Fleabag's life in London. She originally ran a coffee shop in London in partnership with her best friend Boo, but her life changed when her best friend died unexpectedly. Fleabag's life in London is very unsatisfactory: her relationship with her sister Claire (Sian Clifford) is estranged; her father chooses to live with his stepmother and ignores his daughter; her boyfriend breaks up again; what makes her most uncomfortable is that her life now seems to have returned to normal, but the figures of her former good friends often flash. The scenes of the past and the present overlap with each other, and the undercurrent of emotions can't find a proper outlet. What will be the direction of Fleabag's life in London...