Doubt episode 9 recap: Sung-hee turns out to be Song Min-a’s murderer as events progress

Doubt episode 9 recap (Image via Instagram/@mbcdrama_now)
Doubt episode 9 recap (Image via Instagram/@mbcdrama_now)

The ninth episode of Doubt was aired on November 9, 2024, via the MBC TV network. The crime suspense K-drama Doubt consists of ten episodes. Han Seok-kyu, Han Ye-ri, Chae Won-bin, and Oh Yeon-soo play the major roles.

In the previous episode of Doubt, Park Joon-tae admitted to killing Yeong-min and Song Min-a in order to protect Sung-hee. Ha-bin's photo standing close to Yeong-min's dead body ultimately reached the police, and she was named a suspect in the murder.

In the most recent episode of Doubt, Sung-hee was revealed as the murderer of Song Min-a. Furthermore, it turned out that Jang Ha-bin was aware she would be pursued for an investigation from the very beginning, so she studied and analyzed all those involved in the case.


Doubt episode 9 recap: Ha-bin already predicted her interrogation

In the ninth episode of Doubt, Jang Tae-su was interrogating Joon-tae, who was recalling the chain of events that occurred on the day of Song Min-a’s murder. He stated that he couldn’t completely recall how he killed her.

While Joon-tae was being investigated, Tae-su was called out from the interrogation room, and Captain Oh Jeong-hwan showed him the picture of Ha-bin standing next to Yeong-min’s body. Tae-su was soon removed from the investigation and Jang Ha-bin was called for questioning.

While talking to his chief, Tae-su revealed that Joon-tae was not the murderer, as he didn’t even remember what happened on Song Min-a’s murder day. Soon, Captain Oh also found out that Tae-su was being blackmailed by Joon-tae’s father, Jung Do-cheol. Therefore, he asked Tae-su to stay away from the investigation.

When Tae-su went to fetch his daughter from home, he realized that she already burnt her clothes from Yeong-min’s murder day that Tae-su saved as evidence. Ha-bin was then taken to the station. When Tae-su stressed on accompanying her, she refused to take his help and said that she could manage it alone.

Still from Doubt (Image via Netflix)
Still from Doubt (Image via Netflix)

In the meantime, the police received Jung Du-cheol’s call, telling them that Ha-bin killed Song Min-a and Choi Yeong-min. Officer Oh countered, saying that Joon-tae had already made confession for both murders and this shocked Du-cheol. He further disclosed that Ha-bin was present at Mount Daehwa on the day of Song Min-a’s death.

Eo-jin then once again cross-checked Ha-bin’s alibis from Song Min-a’s case. They found that she wasn’t with her so-called boyfriend but she secretly left the hotel that night and went to Mount Daehwa.

Ha-bin was brought to the station and interrogated by Eo-jin. Ha-bin revealed that she kidnapped Yeong-min and hurt him on knees. But she refused to accept the charges of Yeong-min’s murder. Ha-bin also said that Du-cheol dismembered Min-a’s body and she was just a witness. Ha-bin accepted that she followed both Yeong-min and Song Min-a but she didn’t reveal her motive behind it to the police.

As he was removed from investigation, Tae-su went to Sung-hee’s house for questioning. Tae-su separately asked both Sung-hee and her son Do-yun if they saw Song Min-a on the day she was murdered. While Sung-hee said no, Do-yun replied that he met her on that day. These contradictory statements made Tae-su more suspicious about Sung-hee’s innocence.

Still from Doubt (Image via Instagram/@mbcdrama_now)
Still from Doubt (Image via Instagram/@mbcdrama_now)

Tae-su, who recorded Do-yun’s statement on his phone, requested Captain Oh to again summon Sung-hee after showing him the evidence. Following this, both were called for interrogation.

When questioned by Officer Gu, Do-yun disclosed an unexpected truth. Do-yun killed Song Min-a. Do-yun admired Song Min-a, so when she secretly came to Sung-hee's house and requested for a drink, he mistakenly mixed drugs in.

Do-yun got those drugs from Yeong-min’s place, who lived on the ground floor of his house. Yeong-min told Do-yun that those drug tablets made people feel good, so to make Min-a feel good, he mixed the whole packet of tablets in her glass of juice. This became the cause of Min-a’s death, as Do-yun shared.

Being a minor and under the case of accidental death, Do-yun was released by the police. Sung-hee and Do-yun left for home.

Meanwhile, Ha-bin was also released, as she wasn’t involved in Song Min-a’s murder. While Tae-su and Ha-bin were leaving, they were stopped as Eun-jin came to Eo-jin and showed her the video of Ji-su burying the body of Lee Su-hyeon. The video was found on Yeong-min’s tablet.

While Captain Oh was asking Tae-su if Ji-su really killed Lee Su-hyeon, another police official came and informed him about Jung Du-cheol’s location. The police team immediately rushed to the location and Tae-su followed them.

Still from Doubt (Image via Instagram/@mbcdrama_now)
Still from Doubt (Image via Instagram/@mbcdrama_now)

In the subsequent scene, Sung-hee reached Yeong-min’s hideout, where he was killed, where Du-cheol followed her. Du-cheol threatened her with a knife and told her not to frame his son, Joon-tae, in the murder case. While he was threatening her, police arrived at the location. Both Sung-hee and Du-cheol managed to escape the police.

After some time, Sung-hee came back to the police station with Choi Yeong-min’s belongings filled in his bag. The bag had numerous items like phones, money, and more. She handed them over to Officer Gu as evidence and left.

They found messages in Choi’s phone where he was blackmailing Ji-su and extorting money from her to keep Lee Su-hyeon’s murder a secret. With those messages, police believed that Ha-bin killed Lee Su-hyeon and her mother just buried the body. Captain Oh ordered Ha-bin’s arrest. At the same time, Tae-su entered the department with Du-cheol.

Tae-su followed Du-cheol when he escaped from the police. He also convinced Du-cheol to surrender in order to save his son. At first, he couldn’t believe Tae-su but eventually he surrendered.

Meanwhile, Eo-jin checked Ha-bin’s laptop. She found several folders with the information about all the people related to Yeong-min and Song Min-a’s deaths. Eo-jin also found extensive information about the officials of the police department, including herself and Officer Gu.

Eo-jin saw a separate folder for Ha-bin's father, Jang Tae-su, which included the information of the cases he handled and even detailed all the instances when he doubted her. Furthermore, Ha-bin had mentioned Ha-jun’s (her brother) death in the folder and included all the future possibilities of how her father would support her in the ongoing case. Ha-bin predicted everything for her perfect murder.

In the next scene, she was sent to the interrogation room. Eo-jin and Captain Oh told Tae-su how Ha-bin collected all the information and predicted all the possibilities for a perfect crime. They said that Ha-bin killed Lee Su-hyeon but Tae-su refused to believe it. He replied that Ji-su was fooled and Ha-bin never killed anyone.

Captain Oh then revealed that on the day Lee Su-hyeon died, she was with Ji-su and Ha-bin, as proved by their phone signals. Eo-jin said that Ha-bin killed Lee Su-hyeon and she was approaching Yeong-min and Song Min-a to kill them, as they knew about her crime. Eo-jin went on to say that Tae-su helped Ha-bin in her plan.

Towards the end of this Doubt episode, Sung-hee went to a hotel room with a bag full of money. She kept the bag in the room and left.

The next day, Do-yun asked Sung-hee why he forgot everything he did wrong. Sung-hee then recounted the whole incident from the day Song Min-a died. Do-yun couldn't recall anything since Sung-hee killed Min-a, not him. Sung-hee just made up a story that was narrated to him and repeated in front of the police.

In a flashback scene, Song Min-a was seated at Sung-hee's home. Min-a claimed that she was aware that Yeong-min had blackmailed Ji-su in order to extort money, which led to Ji-su's death. Min-a also said that she knew Sung-hee was Yeong-min's accomplice in crime.

As a result, she sought a share of the money. Sung-hee then resolved to kill her. She gave poison and suffocated her with a pillow. Do-yun witnessed her killing Min-a.

Do-yun doubted her mother's motives in the final scene, and he gave her an expression of fright as he distinctly recalled Song Min-a's murder.


The final episode of Doubt will air on November 15, 2024. All the episodes of Doubt can be watched online via Netflix, Wavve, and Coupang Play.

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Edited by DEEPALI
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