Synopsis: After an injury ends his career as a pianist, Yoo-joon transfers to a new school and, drawn by a mysterious melody, meets the enigmatic Jeong-ah. An intense connection blossoms between them, but Jeong-ah remains distant — until she suddenly vanishes. Determined to find her, Yoo-joon embarks on a search that uncovers a secret capable of defying time. A sensitive and poetic drama about music, love, and the pursuit of something that feels just out of reach.