"Seong Gayun," a contestant on a female idol competition show, is in a constant clash with "Soow," a top star with a fiery temper and one of the judges of the contest. As the rounds progress, their hostile chemistry builds the narrative, leading Gayun to grow rapidly and make it to the final stage. However, in the end, she is not selected for the debut group.
With no time to lament, Gayun discovers that "Soow" has the ability to see ghosts and is destined to die soon. The most shocking part is that she herself is the cause of his fatal fate. According to a warning, if Gayun doesn't save Soow from the spirits a thousand times, her afterlife will not be peaceful. With this weight on her shoulders, Gayun disguises herself as a man, changes her name, and becomes his bodyguard.
Now, "Seong Wuyun," who has learned both security and exorcism through YouTube, begins her career as an exorcist. It's time for her to debut as an exorcist!