An ancient legend says that the slab of the Words of the Covenant, inscribed by God, will reveal the secrets of the universe to the one who can read it. And only the heir of Light and Shadow will be able to read these Words. And so this slab turns out to be broken. The forces of Light and Shadow blame each other, which leads to a terrible and long war. But despite the animosity, individuals from both sides try to come together to produce an heir who can read the Words of the Covenant on the slab, pieces of which the forces of Light and Shadow are gradually picking up. And neither side is yet aware of the secret enemy who has infiltrated their ranks...