The series' plot revolves around Sheriff Andy Taylor (Andy Griffith) and his life in sleepy, slow-paced fictional Mayberry, North Carolina. Sheriff Taylor's level-headed approach to law enforcement makes him the scourge of local moonshiners and out-of-town criminals, while his abilities to settle community problems with common-sense advice, mediation and conciliation make him popular with his fellow citizens. His professional life, however, is complicated by the gaffes of his comically inept deputy, Barney Fife (Don Knotts). Barney is portrayed as Andy's cousin in the first and second episodes, but is never referenced as such in the later episodes. Andy socializes with male friends in the Main Street barber shop and dates various ladies until a schoolteacher becomes his steady interest in the third season. At home, Andy enjoys fishing trips with his son, Opie (Ronny Howard), and quiet evenings on the front porch with his maiden aunt and housekeeper, Aunt Bee (Frances Bavier). Opie tests his father's parenting skills season after season, and Aunt Bee's ill-considered romances and adventures cause her nephew concern.

Source: Wikipedia.org