Carl Reiner
A simpleminded, sheltered country boy suddenly decides to leave his family home to experience life in the big city, where his naivete is both his best friend and his worst enemy.
Navin is an idiot. He grew up in Mississippi as the adopted son of a black family, but on his 18th birthday he feels he wants to discover the rest of the world and sets out for St. Louis. There everyone exploits his naivete, until a simple invention brings him a fortune.