From an early age, a girl named Ahn Eun-young has had a special gift: she can see creatures from the other world, ghosts, and human desires that exist in the form of jelly. Some of these jellies can take on dangerous, monstrous forms. Ahn becomes a school nurse at a new school where mysterious incidents begin to occur. Armed with a glowing sword, she navigates the dark corners of the school, protecting students from monsters that only she can see.