Starting high school is a daunting struggle for Ellis Rice, a 14-year-old haunted by the specter Schnabelmaske. At Maple Ridge, Ellis hears a familiar melody and encounters a mysterious girl who vanishes before he can approach her. Desperate to find her, he stumbles upon Schnabelmaske, a sinister specter intent on possessing him. He is rescued by Iris and Claire from La Patisserie, a club that bakes desserts and exorcises spirits.

As Ellis navigates these supernatural occurrences, he uncovers deeper emotional and psychological themes, exploring the challenges of adolescence, including insecurity, bullying, and depression. With the help of his new friends, Ellis learns to confront his fears and discovers the strength within himself to face the mysteries of his past and present.