On his birthday, So Mun's struck by a strange burst of light that leaves puzzling changes to his body. He finds answers inside the local noodle shop.

The Counters give Mun an extraordinary surprise. While contemplating whether he wants to join them, he's given a taste of the action.

Lim Ju-yeon and Kim Ung-min notice something is different about Mun. Ga Mo-tak heads to the police station for answers about his forgotten past.

In a confrontation with violent bullies, Mun loses control over his rage — and must face the consequences. Mo-tak is reunited with his old cellphone.

Do Ha-na saves Mun from the attacks of a powerful demon with a malicious tongue. Kim Jeong-yeong helps Mo-tak look into his last detective case.

While the Counters attempt to keep the truth behind his painful past from Mun, he discovers a mysterious memory card among his parents' belongings.

During a trip into his most traumatic memory, Mun has his first encounter with Ji Cheong-sin. Later, he leads the Counters to a car junkyard.

Things get personal for Ha-na as she takes down a familiar demon. The team tries to locate a reservoir tied to a case Mun's father had worked.

Cheong-sin leaves Mun in a bad state, but Chu Mae-ok is determined to save his life. The Counters set out to make the mayor's corruption public.

Wi-gen calls for an action that could take everything away from Mun. When stunning news about Cheong-sin is reported, the Counters can't believe it.

The Counters struggle in a mismatched fight against an increasingly dangerous Cheong-sin and the other demons. Mo-tak's memories resurface.

A heartbroken Mo-tak and the team plot revenge against Shin Myeong-hwi and his collaborators. While carrying out their scheme, a human corpse turns up.

As Cheong-sin becomes nearly unstoppable, the Counters learn there may be a way to defeat him for good. Mo-tak gets justice for Jeong-yeong.

Myeong-hwi's son notices something about his father isn't quite right. When Baek Hyang-hui kidnaps a young girl, the Counters rush after her.

The team welcomes back a Counter who's been overseas. After confirming his suspicions about his father, Shin Hyeok-u goes to Mun.

The final face-off against Myeong-hwi tests Mun and the other Counters' limits. In Yung, long-awaited reunions take place.

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It's business as usual for the Counters as they work together to defeat malicious demons. Meanwhile, trouble starts brewing in a remote mansion in China.

Ga Mo-tak discovers the perfect recruit when he witnesses a car accident. Hwang Pil-gwang, Gelly, and Wong arrive in Korea and begin wreaking havoc.

The Counters are confronted with an unwelcome visitor at the noodle shop. Amidst a training session with his new protégé, Mo-tak hears alarming news.

So Mun goes head to head with Pil-gwang, while his teammates battle the demon's cronies. Meanwhile, Ma Ju-seok experiences a terrifying nightmare.

Ju-seok's impassioned statement shocks the Counters — but the demons watch on with glee. Do Ha-na reunites with an important figure from her past.

The Counters face a new, formidable demon and gather to devise a plan of action. Pil-gwang and Gelly head to the hospital with a sinister motive.

So Mun experiences a moment of weakness during a crucial battle. Gelly faces a betrayal. The Counters later attempt to put a stop to a fraud scheme.

Ha-na decides to follow through with a devastating decision. Meanwhile, Chu Mae-ok lends a helping hand to a troublemaking young man.

The Counters go neck to neck with Pil-gwang's gang. So Mun is trapped in a life-threatening predicament, and his teammates struggle to find a solution.

Ju-seok and Pil-gwang face a change in their relationship. The Counters celebrate some good news.

Pil-gwang grows more powerful by the day. Although hesitant at first, Ha-na assists So Mun in a dangerous endeavor.

The Counters give it their all to fight the mighty Pil-gwang. Will Ju-seok be able to overcome his demons and put an end to this life-or-death battle?