The polar opposites, Potis Pikoulas and Fotis Firikis, the self-made owners of the "Pi and Fi" supermarkets, are facing their first problems in their relationship. Hard-working Fotis cares about the company, while megalomaniac Potis prefers to party with the plotting femme fatale, Jenny Delastipa, who tries to talk Potis into buying a yacht to break into the upper-class social circles of the rich and famous. However, after catching the beautiful shoplifter, Rosa, in the act, Fotis decides to hire her, in an attempt to bring his spendthrift partner back on track. Will he succeed?