The Dasheng Dynasty was prosperous. The new emperor Xiao Yin ascended the throne and made the talented woman Shen Qingni the first female seal in the world. She was in charge of the "Heart Seal" to bless all people, eliminate pain and stabilize people's hearts.
On the surface, it is a supreme grace to benefit the people, but behind it is the cold truth: the so-called "blessing" is actually using the secret technique of spiritual patterns to extract the joy, anger, sorrow and joy of the people, and refine it into the "heart energy fuel" that drives the operation of the empire. Under the peaceful singing and dancing, the human world, stripped of emotions, is sliding into a silent desert.
Shen Qingni was once the most loyal believer in this system, until she witnessed the living souls that had not been tamed by the heart mark on the border, read the bloody complaints left by the rebels "without traces" in the dark alleys, and glimpsed the inhuman emptiness under the emperor's perfect mask in the deep palace - she began to doubt the "golden cage" she had cast with her own hands.
As the investigation deepens, a truth that makes her shudder emerges: the king on the dragon throne has long been stripped of all emotions and has become the puppet most deeply controlled by the "heart seal". And the foundation that maintains this huge empire is actually the imprisoned soul of the whole country.
Faith has collapsed and an undercurrent has arrived. Shen Qingni stands at the crossroads of fate: should she continue to be the key holder of this delicate cage, or should she become the most dangerous breaker and join hands with the lurking "Invisible Ones" to leverage the eternal imperial power that relies on people's hearts as fuel?
This is a life and death game about emotion and power, freedom and order. When the caster of the cage is determined to become its destroyer, the curtain of the prosperous age is slowly being torn apart.
