Imperial Capital—a city where technology and ruins coexist, and prosperity and conspiracy intertwine. The black card system controls the life, death and future of this city.
The young rebel Xu Lin accidentally obtained the "Key to the Abyss" symbolizing unknown power during an operation, and has since been involved in the vortex of competition between various forces. Ark's mechanical legion, Phantom's assassin Darknet, and the ultimate controller hidden in the darkness have all targeted him.
Between the ruins and the fog, he and his partners fought bloody battles, piercing the fog of the black card system again and again, and getting closer to the ultimate truth hidden deep in the data. Every move is a gamble on the edge of life and death; every journey is an adventure leading to the abyss.
Is holding the key to the abyss a shackles of fate, or a power that subverts everything?
The future of the Imperial City and the game of black cards are being reshuffled.
A dark legend that spans reality and virtuality, a passionate science fiction masterpiece full of battles, conspiracies and human choices!
