Changho, who has no money and is about to lose his wife, receives a call from the mayor of Gucheon

Changho is charged with drug abuse and locked up in Gucheon Prison

Changho needs to maintain recognition as Big Mouse to protect Miho

Gong Jihoon makes a bet with Changho to find out his true identity

Jihoon approaches Miho to find Seo Jaeyoung's thesis. Does Miho know Changho's true identity?

Miho joins the prison medical volunteer program to meet Changho

Jaeho warns Changho to stop looking into Seo Jaeyoung's thesis. Miho is suddenly attacked

Changho is in a mental hospital. Will Changho be able to hide his identity in a state of confusion?

Changho stands as an informant in Seo Jaeyoung's trial, and Jihoon and Jungrak search for Changho

Changho calls out Big Mouse, and an unexpected character turns up at the agreed time

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

The warden plans to use the prison riots to take out Changho and Miho

The hot-plate restaurant is in ruins. The agitated Changho meets someone unexpected there

Changho makes a tempting offer to Chairman Kang. Doha conspires with Yoongab to get rid of Changho

Changho prepares for the full-fledged elections against Doha, but Miho's health is in trouble

The TV debate begins, and the smoking gun that will bring down Choi Doha is at Miho's fingers