Park Joon-tae testifies that he was the only one at the scene when he murdered Choi Young-min. Tae-soo brings Sung-hee to the interrogation room and pushes Park Joon-tae, and he confesses that he killed Song Min-ah to protect Sung-hee. Meanwhile, the police find out whom the necklace found at Choi Young-min's crime scene belonged to.

The violent crimes team identifies Ha-bin as the prime suspect in Choi Young-min's murder. As Captian Oh and the chief order him to step away from the investigation, Tae-soo finds himself in a position without any possible way to make things work. He tries to stop Ha-bin's investigation but soon encounters the shocking truth through Ha-bin's confiscated items.

Tae-soo and Ha-bin find out what really happened to Ji-soo. Tae-soo wants to find the CCTV footage that could be crucial in catching the real culprit, but Ha-bin is against it. Ha-bin thinks it's only right to take revenge on the real culprit for her late mom, but Tae-soo doesn't agree with her.