Like any young man, Louis is about to experience great changes. He is married to an unknown cousin and is to inherit the throne of Spain. In the middle of the 18th century, this would be a happy episode in the life of any prince, but things are not going to be easy for Louis. With a rebellious wife, an alienated father and a conspiring stepmother, Louis I has to begin his reign. Luckily for him, the problems will soon end.