A high-stakes dental procedure in Switzerland triggers a supernatural body-swap that forces a stuffy British aristocrat to inhabit the life of a rambunctious American child. Reggie Havershot, a young man of significant means and limited intellect, finds his orderly existence upended when an anesthetic-induced incident leaves him trapped in the body of Joey Cooley, a famous American child film star. Reggie must navigate the complexities of Hollywood studio politics and the demands of a precocious child's life while his own body is occupied by the mischievous boy. The narrative utilizes a third-person perspective to emphasize the absurdity of the social friction between the rigid British upper class and the frantic pace of the American entertainment industry. The physical constraints of the body-swap provide the primary logical framework for the ensuing comedic complications.

Readers frequently highlight this work as a departure from the author's more familiar Jeeves and Wooster settings, noting its unique blend of fantasy and farce. Discussion often centers on the effectiveness of the body-swap trope in exposing the superficiality of both the British aristocracy and the American film industry. Critics observe that the pacing remains brisk, maintaining the lighthearted tone characteristic of the author's broader body of work. Many readers appreciate the sharp character contrasts that drive the humor throughout the narrative. The book is generally regarded as a clever exercise in situational comedy that rewards those who enjoy the author's distinct stylistic voice.