Aimed at the youngsters, this typical Italian fantasy-adventure stars Steve Reeves as Karim, the thief of the title. Karim is not only the strongest, fastest, and smartest of thieves, he also has a magic ring and a cape that makes him invisible. Thus armed, he is well-prepared to face a series of Herculean tests in order to win the hand of the Sultan's beautiful daughter Anima (Georgia Moll). These "tests" purify his past wrongdoings and ultimately lead to a blue rose, the key to winning Anima in marriage.