In the empire of Chonghua, two young generals rose to prominence side by side. The reserved Mo Xi was known for his commanding air and ruthless temperament. His best friend and comrade, Gu Mang, was the complete opposite: charming and clever, beloved by all…until he shocked the empire by turning traitor to serve an enemy nation. Years later, a feral Gu Mang has returned, his mind broken. The public demands his death, and no one is assumed more hungry for vengeance against him than Mo Xi. But when Mo Xi stays his hand, the question must be asked—what is the true relationship between the pair? And what past secrets hide beneath Mo Xi’s icy exterior and Gu Mang’s tortured psyche?