S1 • E1
Chang-ho, who has no money and is about to lose his wife, receives a call from the mayor of Gucheon.
S1 • E2
Chang-ho is charged with drug abuse and locked up in Gucheon Prison. But wait, is Chang-ho the Big Mouse?
S1 • E3
Who made Chang-ho, Big Mouse, and why? However, he needs to be recognized as such to protect Mi-ho.
S1 • E4
Is Chang-ho really Big Mouse? Gong Ji-hoon makes a bet with Chang-ho to find out his true identity.
S1 • E5
Ji-hoon approaches Mi-ho to find Seo Jae-young's thesis. Does Mi-ho know Chang-ho's true identity?
S1 • E6
Has Chang-ho been lying to Mi-ho? Mi-ho joins the prison medical volunteer program to meet Chang-ho.
S1 • E7
Jae-ho warns Chang-ho to stop looking into Seo Jae-young's thesis. Mi-ho is suddenly attacked.
S1 • E8
Chang-ho is in a mental hospital. Will Chang-ho be able to hide his identity in a state of confusion?
S1 • E9
Chang-ho stands as an informant in Seo Jae-young's trial, and Ji-hoon and Jung-rak search for Chang-ho.
S1 • E10
Chang-ho calls out Big Mouse, and they respond. An unexpected character turns up at the agreed time.
S1 • E11
Chang-ho shifts the power dynamics in the prison to pressure Big Mouse. Do-ha plants a new warden.
S1 • E12
The warden plans to use the prison riots to take out Chang-ho and Mi-ho.
S1 • E13
The hot-plate restaurant is in ruins. The agitated Chang-ho meets someone unexpected there.
S1 • E14
Chang-ho makes a tempting offer to Chairman Kang. Do-ha conspires with Yoongab to get rid of Chang H-ho.
S1 • E15
Chang-ho prepares for the full-fledged elections against Do-ha but Mi-ho's health is in trouble.
S1 • E16
The TV debate begins and the smoking gun that will bring down Choi Do-ha is at Mi-ho's fingers.
Park Chang-ho
Ko Mi-ho
Choi Do-ha
Gong Ji-hoon
Hyun Ju-hee
Ko Gi-kwang
Jung Chae-bong
Dr. Han Jae-ho
Lee Doo-geun
Kim Soon-tae