It was a long and grueling journey, but with the help of Tsushima, Lupus defected to the Free City of Elbar, and the two have attained a measure of peace. However, their newfound stability is shattered when the Balga Empire’s top assassin attacks Tsushima in a bid to take revenge for one of the man’s many past transgressions. Pitted against the assassin's overwhelming power, Tsushima realizes there is only one way he can keep Lupus from getting caught in the crossfire: sacrificing his own life. But Lupus refuses to accept this reckless plan. Her new identity, her hard-fought freedom, and her life free from political intrigue—what do these things matter if her knight has to die for her to keep them? Lupus is going save Tsushima, come hell or high water.