Rei wakes up in the Domed City of Initium surrounded by women calling him the Messiah. Determined to recover the memories he lost during years of cryosleep, he begins living with the six members of the TUNED — young women who wield so-called harmonic weapons. Lonely and confused in a world governed by enigmatic rules, Rei gradually finds comfort in his new companions, even as he senses something is deeply wrong. The secrets of this world will not stay hidden for long.