The four siblings in the Gung family were named after precious jewels: eldest daughter Bi Chwi (Jade), eldest son San Ho (Coral), second daughter Ryu Bi (Ruby), and the youngest son, Ho Bak (Amber). Like an assortment of beautiful gems, their colours may clash and their sharp edges chip away at each other. Using an analogy of a bowl of rice with assorted ingredients to illustrate the workings of a family, the key to a great dish is using the right balance of ingredients in order to create a good mixture. Assorted Gems tells the story of the different lives of the family members and how they learn from their clashes to find the perfect balance.

Han Geon Soo is the young clinic owner who tries to protect his clinic from being taken over by loan sharks. He tries his best to save the clinic when uncollected loans are passed on to him after his father's sudden death. Choi Yong Woo is a talented doctor who joins the clinic to return his thanks to Geon Soo's father. Yong Woo is someone that often gets into arguments with patients who want to undergo unnecessary plastic surgery. Yoon Ki Nam is the nurse who forms a love triangle between the two men. Yoon Seo Jin is the manager who obtained her perfect beauty through plastic surgery.

Yu GangHyuk was only 7 years old when his father was murdered in a car "accident" and separated from his identical twin, Yu Shin-hyuk. He forgot his name and family and given the name Suh Ha-eun by his adopted father Suh Jae-soo. He falls in love with his adopted sister, Eun-ha and tried to be very honourable about it. He was led to become a cop because of his father’s badge. While investigating an alleged case of suicide, he eventually learns of his twin brother. Against the warnings of his peers, Ha-eun becomes more and more involved in this suspicious case. As a part of a larger scheme, Ha-eun is targeted for a hit by unknown individuals. And when Ha-eun and Shin-hyuk finally meet for the first time after twenty years, the murderers kill ShinHyuk accidently mistaken him for Haeun. As a result, Ha-eun vows to get revenge by giving his enemies psychological torture and takes on his brother's persona as an undercover cop and that is where the drama begins... This is a wonderful detective drama with a psychological twist.