Penumbra, Prisma's younger yet more mature half-sister, is still furious with her older sibling for having gotten away with the theft of the information from Yanel's Utopia Island, information which Penumbra now believes the Tower wants for itself, and the theft of which the Tower authorized, though the official story says otherwise. In bringing Prisma to justice, Penumbra intends to uncover the truth behind the Tower's true intentions.