Jeong Tae-se, a 26-year-old musical prodigy hailed as the “Second Beethoven,” is celebrated for his brilliant compositions and arrangements. But when a crippling creative slump threatens his career, he unexpectedly finds a new muse: Seol-ah, a mysterious woman he encounters during her attempt to end her life. Struck by the raw, haunting emotion she evokes, Tae-se becomes dangerously obsessed. Convinced that she holds the key to his artistic revival, he spirals deeper into a twisted fixation—blurring the lines between inspiration and possession.