 Dwight Davis, a widower and grammar school principal, has the task of raising his three sons, along with the help of his wacky father Gunny. After the series moved from ABC to CBS, the oldest son and his friend were dropped and Dwight s sister was added. Added as well was Skinner, a son of some of Dwight s college pals who moved in. It was explained Skinner s parents were archaeologists located in Latin America. Also the oldest son was said to have become a foreign exchange student. Appearing occasionally was Dwight s love interest Erika, but she soon ran off and joined a convent.