In a world where modern cities intersect with the mysterious "Yin Ruins" dimension, the Night Watch organization has guarded the secret of the balance of Yin and Yang for generations. The protagonist Lin Shen is a white-haired but energetic veteran of the Night Watch. The star mark on his chest is a symbol of his identity and strength. Thirty years ago, he and his partners relied on unique equipment such as soul-suppressing coins, rune instruments, and bronze bells to fight fierce battles with dark forces such as the Yin Ruins creatures and the Anti-Star Society in Shanghai and around the world. They sealed the "Yin Ruins" everywhere and prevented the crisis of eternal night.
