Taehyun is the first to dream of her—the girl on the cliff. In his dreams, she never speaks. She just cries and stares at the sea as music echoes in the background. At first, he thinks it’s just his imagination. But when the dreams start happening every single night, and she starts turning to look directly at him, he knows it’s more than just sleep.

He starts documenting everything. Dream logs, sketches of the girl, the melody he hears—he even recreates it on a keyboard. That melody? It’s the exact same one Beomgyu hears in the attic. And the same one Yeonjun starts humming in his sleep.

Taehyun becomes the investigator. The one who pieces it all together. He discovers that the girl was a pianist, and the musician who loved her vanished trying to complete a song that would “bind their souls forever.” Taehyun figures out that they were caught in a love so strong, it tore the veil between life and death.

But here’s the twist: the dreams aren’t visions—they’re memories. Taehyun isn’t just dreaming of the past. He was part of it.

In a past life, Taehyun was the girl’s younger brother. He tried to stop her from giving her soul to the cursed song—but he failed. And now, he’s getting another chance.

As the past starts bleeding into the present, Taehyun races against time to change the outcome. But will breaking the curse cost him his memories, his identity… or someone he loves in this life?