Big Mouth

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.