Cha Seeum becomes the new conductor of the Hangang Philharmonic, but her reforms prompt a backlash.

Cha Seeum decides to focus on the orchestra. However, crisis looms with rumors of Kim Phil's affair.

Cha Seeum and Kim Phil manage to finish the new song, but a sudden accident causes chaos.

Cha Seeum orders Yoo Jeongjae to keep her secret. The fear of it getting out again torments her.

As Cha Seeum's fear of her illness grows, Bae Junghwa's Remington diagnosis shocks everyone.

After Bae Junghwa's funeral, Cha Seeum subjects the orchestra’s members to a blind test.

Cha Seeum learns that she was Kim Bongju's last call before his death but cannot recall that night.

Detective Choo suspects Seeum in the case of Kim Bongju's death and begins to close in on her.

Cha Seeum discovers that her symptoms are caused by poison; Cha Seeum learns about Yoo Jeongjae's spy.

Everyone unites to track down the poisoning culprit; a key clue to their identity is found.

Cha Seeum comes up with an ingenious plan to lure the poisoning culprit out of hiding.