At Nova City International Academy, the neon lights shine bright-but the shadows run deeper.Han Yoo-na doesn't chase attention. She captures it-quietly, through the lens of her camera. Her photo blog, Nova City Moments, reveals the unguarded instants her classmates don't realize they're showing. But when an anonymous post on the school's secretive forum whispers about buried truths and a forgotten cherry tree, Yoo-na finds herself pulled from observer to participant in a mystery far older-and far more dangerous-than she ever expected.With only her camera, her instincts, and a reluctant alliance with Kwon Min-jun-the school's aloof art prodigy-Yoo-na follows a trail of cryptic messages, hidden histories, and a yearbook photo that someone has tried very hard to erase. As the truth begins to surface, so do questions: Who was Im Soo-hee, the girl no one remembers? What happened during The Nightingale's Song, a student showcase that ended in silence? And why is Park Ji-ho, the school's perfect class president, so desperate to stop her from digging?But the past doesn't stay buried. And as the anonymous posts grow more personal-and more sinister-Yoo-na must decide what she's willing to risk to uncover the truth... before the same shadows that consumed a student decades ago come for her next.