In the feudal city where prosperity and shadow intertwined, the thread of fate quietly entangled two people who should not have met.
Huo Yuan, twenty-seven years old, looks cheerful and free-spirited, but is actually a judge in charge of the underworld, walking on the edge of life and death, hiding the frost of the underworld with a smile; Song Yanqi, thirty-two years old, a well-known human law enforcer, selfless, walking on thin ice, and holding on to the glimmer of justice in the gray area.
They belong to two different worlds, but their fates intersect due to a bizarre case. From being wary of each other to walking side by side, they shuttled through the fog of mystery, faced the darkness and greed deep in the human heart, and witnessed the undying warmth and conscience in despair.
When the judgment of the underworld meets the legal principles of the world, when the indifferent blade holder meets the fiery lawful people - a journey to pursue the murderer across yin and yang begins. At the boundary between good and evil, they jointly write the warmth and coldness of justice that belongs to this era.
Concept: Two strong men, men and women