H.G. Wells' the Invisible Man

The King of a neutral desert country is assassinated in a coup by the power hungry General Sahfari who wants to play the East against the West for profit. The crown Prince races home from his studies in England to regain control of his country, with Peter secretly following. The Invisible Man soon finds himself involved in a dangerous web of international intrigue while he protects life of the king’s sister and helps her brother regain the throne.