Nam Han Joon is a former criminal profiler, who now works as a fraudster. For his scams, he disguises himself as a fortune teller and runs the fortune teller shop Minamdang. He attracts customers with his attractive physical appearance and smooth talking skills. He scams his customers for money, but he also gets involved in their cases and helps solve them. He even provides customer service for his clients. Nam Han Joon's partners are Soo Cheol and Nam Hye Joon. Soo Cheol runs a private detective agency and Nam Hye Joon is Nam Han Joon’s younger sister. She is an elite hacker. Han Jae Hee has worked as a detective for 3 years. She is enthusiastic about her job and tries to follow a righteous path. Somehow, Han Jae Hee gets involved with Nam Han Joon.

Living with neurological blindness that limits his ability to see color, Yeon Woo has grown up in a world that looks very different from the one most people are accustomed to seeing. Only able to decipher varying tones of gray, Yeon Woo knows the world is full of colors but he has never seen them for himself. At least not until the day Yoo Han comes crashing into his world. As if brought together by fate, Yeon Woo's life is forever changed the day he meets Yoo Han. Falling for the boy's many charms, Yeon Woo is overwhelmed by the unexpected rush of emotions he feels every time Yoo Han is near. What's even more surprising is the sudden rush of color that washes over the world whenever Yoo Han walks into the room. Could this be a sign that Yoo Han is his destiny? While Yeon Woo ponders his fate, his aunt Yi Rang searches desperately for the sister who went missing years ago. Joining his aunt on her quest, Yeon Woo recruits Yoo Han's help and together they search for his mother. As they dig deeper into the mystery surrounding her disappearance, an unexpected story begins to unfold. Will these fated boys be able to solve the mystery of a missing mother while simultaneously unraveling the mysteries of their own hearts?