Sheryl volunteers to give a relief concert for the N.U.N.S. 33rd Naval/Marine Zentradi Fleet at planet Galia 4 (惑星ガリア4), but because of a sudden illness she faints right after arrival. This starts a mutiny from a Zentradi Marines faction, who promptly take Sheryl's entire entourage (including Alto) hostage. In an attempt to defuse the situation, Michel flies to Galia 4 carrying a very special cargo - Ranka Lee.