Two nations, the Empire and the Nebulis Sovereignty, have been at war for 100 years. Imprisoned for freeing a witch, Iska is given a chance at freedom. In exchange, he must take down a powerful astral mage known as the "Ice Calamity Witch."

After their brief but fateful encounter, Iska and Alice made an impression on each other, resulting in some sleepless nights. Despite being on the opposing sides of the war, they soon learn that they have much more in common than they thought.

Iska is given a new mission to apprehend the Ice Calamity Witch. By accomplishing the mission, Iska will be a step closer to realizing his dream of a peace treaty. When Iska and Alice meet again, they aren't prepared for what's coming for them.

100 years ago, a drift of astral energy created a vortex which cursed, or gifted, people with astral power. Now another vortex has formed, triggering a race between the Empire and the Nebulis Sovereignty to acquire it.

The members of Unit N07 successfully locate the vortex, but the Sovereignty had already found it. After Mismis is captured, Iska must fight against Kissing, a purebred, to get her back before the Empire attacks the Sovereignty base.

Iska and Mismis survive the eruption of the vortex, but the team doesn't escape unscathed. Meanwhile, Alice decides to go search for Iska in Ein again. They are reunited by fate, but everything is jeopardized when Rin makes a big miscalculation.