Sin Hye-seon was framed for murder.
On the second episode of the tvN drama "Secret Forest", Yeong Eun-soo (Sin Hye-seon) had her face exposed as a 'murderer prosecutor'.
Despite Hwang Si-mok's suggestion, Yeong Eun-soo took on the Park Moo-seong (Eom Hyo-seob) case just when she graduated from junior examiner. She moved under Seo Dong-jae's (Lee Joon-hyuk) orders and went to trial and interviewed with the media.
Seo Dong-jae told her a way to submit black-box footage as evidence in the Park Moo-seong case and Yeong Eun-soo did just that, leading to Kang Jin-sup getting 22 years in prison for homicide. However, he killed himself in prison claiming he was guilty and Han Yeo-jin (Bae Doona) found more evidence to turn the case around/