Every journey has an end.

Struggling to find the answers she wanted in Skyfell, Thalia, Joss, and Kael happen to be Haven having a prisoner in tow. An strike on the road waylays their programs, and Thalia finds herself traveling alone with Kael to the concealed sanctuary from the SwordBrothers.

But war is on the horizon and the Raven is amassing his military. This time, the target is not Calandry, but the Sirens of Sinnedor. When family members ties are revealed, Thalia must choose sides. Eager to break the final seal on her behalf power and conserve those she enjoys, will Thalia willingly flavor the bitter pain of the iron butterfly machine one final time?