Crystal World, a grandiose fantasy attraction, a computer Disneyland, suddenly comes to life. It becomes real and real, taking with it several thousand tourists into the computer world through the looking glass. From the world created by the imagination of the classics of world fantasy and embodied by the genius of the great programmer Arthur Lee North, only one is destined to return to the 21st century. A person whose path was planned long before birth. To the one whom the local Oracle will call the Knight-with-the-Black-Sword. A martial arts master who cut his way back and became a Guide between two worlds...