Allan Quatermain and the Lost City of Gold (1986)

In "Allan Quatermain and the Lost City of Gold," Allan Quatermain embarks on a perilous journey to uncover the fate of his missing brother, Robeson, who vanished while seeking a mythical 'white tribe' in Africa. Upon his arrival, Allan stumbles upon the fabled Lost City of Gold, ruled by the malevolent lord Agon. There, he finds a brutal operation where countless white slaves toil under Agon's oppressive regime. Determined to rescue his brother and liberate the enslaved, Allan must navigate treacherous challenges in this adventure of a lifetime.