Jang Hye Sung, a bold, sassy, thick-faced, comical, and materialistic public defender who becomes a lawyer after overcoming poverty and painful memories from her childhood, comes to realizations about society and justice after meeting Park Soo Ha, a 19-year-old boy who reads other people’s thoughts and Cha Kwan Woo, an innocent lawyer who lives a disciplined life. Jang Hye Sung is actually Soo Ha's first love after she gave a decisive testimony on his father's murder case 10 years ago and Soo Ha promised to protect her from the killer's threats. Meanwhile, Cha Kwan Woo is Jang Hye Sung's fellow lawyer who is a cheerful and idealistic former cop even though his character a bit slow, he is nice and pleasant with a firm idea of his principles and justice. Together they will team up to to find the justice in the courtroom and solve the toughest cases with less than 1% chance of winning.