Under the enchanting glow of a blue moon, Prince San and Knight Wooyoung discover a rare magical "Artemia blossom" blooming in its light, a symbol of hope and love. Its vibrant petals spark a journey of discovery, guiding the two childhood friends to confront their feelings for each other. As they share their hearts beneath the moonlit sky, the bond they've cherished blossoms into a beautiful love story, filled with loyalty and trust.