Yeon Woo is a boy with complete monochromat, also known as neuropathic color blindness. He lives in a world where everything is black and white or shades of gray until Yoo Han comes into his life. A strange phenomenon occurs whenever Yoo Han comes near Yeon Woo. Yeon Woo is overwhelmed by what Yoo Han can do to him but his curiosity continues to grow. Meanwhile, they decide to team up together to search for Yeon Woo’s mother who went missing years ago. Will these boys be able to solve the mystery of a missing mother? This drama will show how these fated boys support each other to find the answers in their life and learn that anything is possible when you have the right person by your side.