In the fictional Great Jin Dynasty, regional princes carve up the realm, while undercurrents stir among the martial world factions. The imperial court establishes the Pavilion of Heavenly Secrets to keep the martial world in check, while martial artists fight over the Nine Li Map and the destiny of the realm.
He holds half of the Black Iron Token, giving him control over the northern martial world. She possesses a Fireheart Physique that can sense fragments of the Nine Li Map. Fate draws them into the twin struggles of imperial power and the martial world.
Forced to approach him to save her younger brother, she discovers the tenderness beneath his icy exterior as they spend time together. When the Nine Li Map emerges, they must evade the imperial court's pursuit and uncover the mysteries of their own pasts. As the truth comes to light, her Fireheart Physique turns out to both complement and counter his Black Iron Token, and the gears of fate begin to spin wildly…