Quatre amis immatures qui tiennent un pub irlandais à Philadelphie essaient de s'intégrer dans le monde adulte du travail et des relations sociales. Mais leurs biais et leurs préjugés leur font rencontrer de nombreux problèmes qui produisent tout autant de situations inconfortables.
Dennis and Mac make a decision to take away all rules concerning moral and behavioral etiquette at Paddy's after an argument about the Constitution. Frank uses the decision and it's following consequences to his own gain. Meanwhile, Charlie tries to convey his love for America by protesting while Dee attempts to reaffirm her goal of being an actress.