Lin Su (codenamed "Ghost"): The ace agent of the international secret organization "Undercurrent", who is proficient in disguise, psychological manipulation and close range killing. Her mission completion rate is 100%.
Qin Xiao (codename "Cang Lang"): Captain of the "Blade" special forces in the Eastern Theater Command, an all-around soldier, good at tactical planning and frontal assaults.
Lin Su is "ice" and her mission is everything to her; Qin Xiao is "fire" and protection is his instinct. Every encounter between them is a collision of world views and values.
