The film also features French comedian Fernandel, Anita Ekberg and Martha Hyer, and a rare appearance by writer/director Preston Sturges.

Popular American comedian Bob Hunter (Bob Hope), star of stage, movies and television, boards the luxury liner SS Île de France to travel to France, only to find his French counterpart, Fernydel (Fernandel) is on the ship as well.

A series of suspicious accidents and mishaps then leads to Bob being arrested as a suspect in the murder of Serge, but he is rescued by the American ambassador (André Morell) and Inspector Dupont (Yves Brainville), who tell him that Serge used his manuscript to reveal the identities of counterfeiters who had infiltrated their way into high offices in the French government, which is why he was murdered.

Helped by Ann, Fernandel, and villainess-turned-heroine Zara, Bob is chased all over Paris by the underworld, at one point winding up in a mental asylum for safekeeping.

[5] The film's World Premiere took place in England on 27 February 1958 at the London Pavilion theatre with Bob Hope and Fernandel in attendance.