Changho shifts the power dynamics in the prison to pressure Big Mouse. Choi Doha plants a new warden.

Namsoon begins her search for her parents in Korea but experiences some roadblocks. Geumjoo suspects something’s off with her newfound daughter.

The incident at the Han River puts a spotlight on Namsoon. As Kang Heeshik spends more time with Namsoon, he connects the dots about her family.