Yun Xi, the youngest senior historian at the Bureau of Astronomy, is clad in white, cool and aloof as if untouched by the world. She can read the stars and celestial signs, discerning the fate of the nation and the secrets of destiny, yet she alone cannot see through the fate that has ensnared her.
Mars guards the heart of the sky, and an ill omen appears. Her words shake the court and draw the attention of two sons of the supreme ruler.
Crown Prince Rong Yuan is solitary and proud. One glance at her lonely figure on the snowbound Starwatching Terrace, and he carves her into his heart. His love is deep, calculating, a guardian in the dark, and a possessiveness bordering on obsession, like fire beneath the ice: restrained yet searing.
Seventh Prince Xuan Huang is bold and passionate, falling in love with her at first sight and declaring it openly. His love is a conquest that storms the gates, a madness that cares nothing for the consequences, like a wildfire sweeping across the plains: domineering and direct.
They both believe that her warm understanding with the General Who Guards the Nation is what her heart desires. They do not know that her heart has never belonged to the mundane world.
Faced with passion closing in at every turn and a profound love that leaves no room to escape, Yun Xi remains as composed as she is when reading the stars. Until the brothers turn against each other, the court falls into turmoil, and celestial secrets collide violently with imperial power...
She uses herself as a chess piece, laying out an astral scheme that will shake the foundations of the nation, all to break free of this deadlock of tangled love and desire.
When the dust finally settles, who can truly hold on to that solitary star, which has always belonged to the vast sea of stars?
