Gianni Aleardi (Gianni Morandi) is a cadet at the Navy Academy in Livorno; having obtained a license just before embarking on the end-of-course cruise on the Andrea Doria, he decides to return to his family in Rome together with his friend Saro Spampinato (Enzo Cerusico). During his stay, he meets in a ballroom a young Japanese princess, Liù (Elisabetta Wu), daughter of Prince Hiro Toyo (George Wang), Japanese ambassador to Rome, with whom he falls in love. Hiro Toyo is also a friend of Gianni's grandfather, Admiral Aleardi (Enrico Viarisio). This friendship, however, does not prevent the Ambassador from opposing the marriage, because Liú is betrothed to a Japanese nobleman.
The score’s main theme, “You’ll See Me Return,” is a lightly romantic rock/pop piece led by marimbas and xylophones, underpinned by lush strings, a cooing vocalist, and a contemporary drum kit rhythm section. There is also a lovely (if somewhat stereotypical) Japanese inflection to the theme’s chord progressions, clearly alluding to the national origin of the lovely leading lady. It’s a lightweight theme, really little more than extended instrumental, but it certainly proves that Morricone is adept as writing and arranging music successfully in literally dozens of different styles.