Kobayashi Uta appears to be an ordinary office lady, but in reality, she is a member of the combat ninja unit "Scorpion." Her workplace is actually Scorpion's headquarters, where she carries out ninja training and missions alongside her daily duties. One day, Uta is assigned an extremely dangerous special mission: infiltrate the Golgotha hideout and destroy its computer system. After careful preparation, she successfully infiltrates the base, only to find the central area swarming with countless zombies. Overwhelmed as the zombies keep reappearing no matter how many she defeats, Uta is gradually cornered and eventually captured. Her entire body is licked repeatedly, drenched in zombie semen and urine, until she finally collapses from exhaustion.