...

Yoo Hye Jung was a tough bully in school with a prickly personality and always goes wayward. She had many scars from her childhood and through self-preservation, Hye Jung keeps her heart shut away from other people. However, she changes after meeting her mentor Hong Ji Hong who plays a key role in transforming her life from a helpless gangster to a compassionate doctor....

The drama tells the story of Ji-o (played by Kim Rae-won), who is sought after by the world because of his special abilities, and Goo-reum (played by Lee Da-hee) who is the only crime squad detective who remembers his appearance. They both fight against a huge conspiracy together. Based on Darwin's "On the Origin of Species", the seed of life that can be traced back to the origin of all life forms is called "LUCA"....