Agnes Brown (Brendan O'Carroll) is an independent market trader, selling fruit and vegetables on Dublin's Moore Street. It has been under attack from P.R. Irwin (Dermot Crowley), a TD (PRIC) who is in an arrangement with a ruthless Russian businessman who wants to put all the market stalls out of business and open a shopping centre on the site. Her stall is the next to be targeted, being sent a bill for unpaid tax left by her grandmother, and a man (working for Irwin) appears offering to buy her stall and make the bill disappear. Agnes nearly accepts, but Winnie (Eilish O'Carroll) reveals this news to the locals, forcing Agnes into defending her stall from the developers while they look for ideas on how to raise the money. Agnes' friend Philomena Nine Warts informs her that her grandmother, Mary Moccasin, was next to Agnes' grandmother at the tax office when she paid the bill and therefore no money is owed. Unfortunately Philomena's grandmother is hit by a bus on the way to the courtroom before she can testify.