The 12 season of It's Always Sunny in Philadelphia was broadcast on FXX from mercredi 4 janvier 2017 to mercredi 8 mars 2017. It consists of 10 episodes, the first one is called "The Gang Turns Black" and the last one "Dennis' Double Life".
Four egocentric friends who run a neighborhood Irish pub in Philadelphia try to find their way through the adult world of work and relationships. Unfortunately, their warped views and precarious judgments often lead them to trouble, creating a myriad of uncomfortable situations that usually only get worse before they get better.