"Illusion" is the story of Teacher Jane, a music teacher at a private high school. She became the target and the victim of her own group of students; Time, Per, Tae and Yu, the children of nationally influential people. Until it became the big news of 2022 and she has to fight and figure out how to restore her reputation through various methods. As a result, she learned some secrets that the powerful clan was hiding... information related to the disappearance of one person!