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

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

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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

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

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

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?