Song Mino is the perfect man. He is the heir of the biggest jeweller's craft, the Song Jeweller Company, in South of Korea. He is one of the best jeweller designer who creates his own design. His creations reinforte the prestigious reputation of the company. He is also handsome and stylist. He thinks that the company doesn't need anyone else for the different projects and with his team, he can take care of everything. He loves to party with his friends and often has different girlfriends but when it deals with job, he is very serious and competitive. 

Bae Irene is a jeweller designer who graduates from Paris. She is an orphan and doesn't know her biological parents. Her dream is to graduate from Paris and become a jeweller designer. Everyone think that she is just a pretty girl but she worked hard until she got a scholarship for realizing her dream. She comes back to South of Korea because Song Mino's Grandpa offers her a job as a designer in the company. Despite her angel appearance, she has a strong personality and doesn't afraid to face up to an obstacle.

What will happened when two genius designers meet each other ? How Song Mino is going to face up his new competitor in his own company ? What is exactly Mino afraid ? How Bae Irene is going to manage her situation in the company ? How will she react when she is going to discover her true identity ? What is their common trait ?