The most famous work of the cycle about the favorite hero - an adventurer, a master marksman and an ideal English gentleman Allan Quartermaine.

Allan Quartermaine and a motley company of his companions are sent into the wilds of Africa - to meet adventures, in search of a lost city, founded in ancient times by King Solomon himself.

Legend has it that the largest, most precious diamonds of Africa are mined in this city. But the way there is not close and dangerous, and those who have reached the mines of King Solomon have never returned.