Bong-hee, who is studying hard to become a lawyer, witnesses the love affair between her lover, her student Hee-joon, and the daughter of the District Attorney. Bong-hee, who's desperate, walks away with the man in front of her.

Bong-hee, who's reunited with Ji-wook, feels protected against Hee-joon's sarcasm and falls in love with the lawyer. However, Bong-hee is suddenly suspected of murdering her boyfriend, Hee-joon. She relies on Ji-wook, but he gets in charge of the case.

Ji-wook asks Eun-hyuk, even though he doesn't trust him, to defend Bong-hee, who nobody is taking charge of. Eun-hyuk is overjoyed. Ji-wook is told by the District Attorney to convict her, but two weapons come out in another place...

Bong-hee wants to find the true criminal by relying on the melody hummed by the criminal. She uses a banner and goes to the place where the weapon was found. Meanwhile, Ji-wook retires as a prosecutor and works as a lawyer with Eun-hyuk, but he's living boring days.

Ji-uk resigns from his current law firm with plans to open his own practice. Meanwhile, on breaking news, a celebrity chef is found dead at his home.

Ji-wook visits the District Attorney's office to catch Hee-joon's murderer. He gets angry and becomes uncomfortable at the office. On the other hand, Bong-hee is getting an interview to be employed to the law office. She's at the same pub where Ji-wook and Eun-hyuk are.