Six short months after leaving the only place she ever called home, Robin is uprooted from her life once again when she finds herself thrust into the Cyfrin compound to infiltrate it from the inside out. Her mission is simple: gather information that will help defeat Toshiro and his followers once and for all. However, nothing is as easy as it seems, and Robin quickly learns that to blend in, she'll have to compromise her morality. As she struggles with the day-to-day horrors of living with the Cyfrin, she finds comfort in newfound friendships and an unexpected budding romance. But will it be enough to help her survive?