Three ninja siblings Ginga [Galaxy] Mitsurugi (blue scarf and stripes on helmet), Suisei [Comet] Mitsurugi (yellow scarf and stripes on helmet), Gekko [Moonlight] Mitsurugi (female, red scarf and stripes on helmet), battle the alien warriors of the Scorpion Army (Sasori Gundan). When giant monsters appear they use their magical swords to transform into the giant warrior Mitsurgi: "Mitsurgi Sanjou: Chi. - Jin - Ai!" (Calling on Mitsurgi: wisdom, benevolence, love). What's different about this s tokusatsu series is the giant warrior and the giant monsters are clay figures animated using stop action photography, not men in costumes.