Jung Chae-yeon, known mononymously as Chaeyeon, is a South Korean actress and singer. She is a member of the girl group DIA and former member of a project girl group I.O.I, having finished 7th in the survival show Produce 101. From Wikipedia
Each of the 12 episodes uses realistic courtroom drama to address emotional wounds under the mentorship of rookie Kang Hyo-min alongside partner Yoon Seok-hoon.