Every night at exactly 11:11 PM, Jungwon climbs onto the rooftop of his apartment and writes a letter addressed to "The Moon." He folds it into a paper crane and lets it fly, watching it drift into the night sky. You, his next-door neighbor, often see him doing this but never ask—until one night, your curiosity gets the better of you.

When you finally ask, Jungwon smiles softly and tells you, “They’re wishes. For someone I lost a long time ago.”

But one night, a paper crane ends up on your balcony with your name written on it. Confused, you unfold it to find a message: “I think I found who I’ve been wishing for.”

From there, you and Jungwon start writing letters to the moon together—sharing secrets, fears, and small joys. But something strange begins happening. The more you write, the more vivid your dreams become—of past lives, of promises made under starlight, and of a love that never quite got its chance… until now.