According to legend, the native tribes of Imperia harbored a mysterious power capable of warding off death itself…

As war threatens the safety of her brother and everyone else she holds dear, the daughter of the emperor, Iris Wu, turns her back on her royal title and joins the ranks of the Order of Alabass. The Order is a powerful group of international outcasts looking to make a name for themselves. Despite their seemingly righteous intentions of fighting back against the oppressive ruling nations, Iris discovers that the Order is harboring a dark secret.

She learns that their leader is hunting for a legendary power, known as the Blood Marrow, and Iris becomes more valuable than ever.

For any hope of survival, Iris must discover the truth of the legend—if there is any truth to it at all. In a thrilling journey of power, mystery, and love, she soon learns her past, her pedigree, and her future are more intertwined with the Order than she had ever imagined.