At first, people thought that Cthulhu's invasion was just a legend, until one day, Chen Mo saw monsters killing humans with his own eyes... At the critical moment, Chen Mo's weird dreams gave him powerful power. The illusory door and the weird key in the dream turned out to be important weapons against them. Can Chen Mo lead everyone to fight against the invasion of monsters, and can he explore the truth of this world? His sister's bizarre symptoms, the organization composed of monsters, the truth about the "shield"... All kinds of events surround Chen Mo like a mist. Consciousness and reality, which one is the real reality...