In Victorian England, businessman Paul Bultitude and his son Dick exchange bodies after making a foolish wish on a magic stone. Dick, now in his father's body, enjoys running the family business, while Paul endures the horrors of boarding school under the cruel headmaster Dr. Grimstone. As they navigate their new lives, both father and son gain a deeper understanding of each other and the challenges they face. Through a series of humorous and poignant misadventures, they eventually learn to appreciate their own strengths and weaknesses, and the importance of family bonds.