The story revolves around a clever con artist, Lee Ro Um, who lacks empathy but has the gift of gab. She is also a genius who can memorize everything she sees. One day, she gets falsely implicated on charges of killing her parents and gets imprisoned. Ten years later, she is exonerated with the help of a passionate lawyer, Han Moo Young, who is excessively empathetic by nature. He is the complete opposite of Ro Um in terms of their personalities, but the two of them form an unlikely alliance to fight against wrongdoers and evil.