It's Always Sunny in Philadelphia is a half-hour comedy that focuses on four friends who own and operate a bar in South Philadelphia and try to maintain the balance of power between their business and friendship. In the show's first season, the gang tries to prove Charlie is not a racist; a girl from Charlie's past reveals that he is a father; they relive their high school years; the gang learns that Charlie might have cancer; the guys buy a gun; Mac and Dennis get close to a dead man's granddaughter; and their gym teacher has been accused of molestation.