Immortal Palace × Human World × Hell
Legend has it that above the hell is the underworld, and below the blue sky is the human world.
People with yin and yang eyes are called "half-mute" in the underworld and "half-blind" in the upper world. Their identity is a mystery, their strength is unknown, and they are destined to be extraordinary since birth. Secrets buried for thousands of years, the missing ferryman from hell, the emperor who has the heart of the world...
Everyone yearns for hell, and all sentient beings hate heaven.