In a not-so-distant future, where pests defy traditional extermination methods, a Japanese corporation introduces Hoi Hoi-san, miniature robotic insect hunters resembling dolls. A rival company counters with their own creation, Combat-san. Despite their cute facade, these diminutive robots have captured the hearts of many enthusiasts. As night falls in the dwelling of a devoted admirer, Hoi Hoi-san and Combat-san embark on their insect-eradicating mission, where a twist unfolds as Combat-san reveals a darker agenda against her fellow robotic companion.