Lee Kyung’s past finally came out. Ten years ago, she was accused of a murder she didn’t commit. The real story began at a party hosted by Kang Hwi-rim. A friend died after drinking alcohol laced with drugs.
Hwi-rim forced Lee Kyung to drink the same, but when things went wrong, he blamed her. She went to prison, her father’s company collapsed, and her family left her behind.

She nearly ended her life in prison. But one day, she saw Hwi-rim on the news being called a “successor.” That moment changed everything. She decided to take revenge. That revenge became the heart of episode 9.
Kang Eun-soo, played by Lee Young-ae, felt completely betrayed. She trusted Lee Kyung, only to realize she was being used. She cried and said, “You knew my pain, and you still did this.”
Her pain felt real, quiet, and sharp. She then faced another problem — Jang Tae-gu demanding money. Eun-soo didn’t panic. She simply said, “You want the medicine? Then buy it with money.” The deal was for 2 billion won.
A Web of Greed and Lies
Meanwhile, the episode showed how greed and corruption destroy everyone. Choi Kyung-do, a police officer, got caught up in a scandal. He was accused of taking bribes from a group called “Phantom.”

But it turned out he was set up by Tae-gu. Tae-gu mocked him, saying he warned him not to “try too hard.” It was a cruel moment that showed how deep the rot went in the police force.
Tae-gu wasn’t done. He sent a rookie detective to spy on Eun-soo’s daughter, Su-ah. He wanted to catch Eun-soo no matter what it took. That scene gave a cold feeling — like watching people lose their humanity step by step.
Then came another shock. Jun-hyeon woke up in the hospital. When he saw Eun-soo’s family photo, he realized she was the one who hit him and killed his brother in a past accident. His anger took over. He decided to take revenge by hurting Su-ah. That thought alone made the episode feel dangerous.

Do-jin, Eun-soo’s husband, found out something else — that his wife was secretly planning Su-ah’s study abroad. He was already suspicious after hearing from Kyung-do that Eun-soo was connected to another case.
He searched her car and found drugs. His shock was silent but deep. Everything between them started falling apart.
Su-ah, unaware of all this, kept doing her part-time job as a courier. But her job wasn’t innocent. She was delivering the same drugs that ruined her mother’s life.
A rookie detective and her best friend, Yoon Jin-hee, caught her in the act. That moment showed how the sins of adults were now destroying the next generation.

The Trap Closes In
Near the end, Hwi-rim decided to bring both Lee Kyung and Eun-soo to his villa. He said he would buy all the leftover drugs. It sounded like a deal, but it was another trap.
Jin-hee called Tae-gu and reported that Su-ah was delivering the drugs. That call started a chain of chaos.
Jun-hyeon, chasing Su-ah, appeared out of nowhere with a weapon. The rookie detective tried to stop him but failed. The episode ended with Jun-hyeon standing before Su-ah, holding the weapon, eyes full of rage. It was quiet, tense, and terrifying.
Episode 9 showed what happens when truth mixes with revenge. Every character made choices that can’t be undone. Each one thought they were right. But every step pushed them closer to destruction.

Lee Young-ae’s acting was steady and full of control. Kim Young-kwang’s cold expression gave the scenes a raw energy. Park Yong-woo’s presence made Tae-gu’s cruelty believable. The balance between performance and story felt strong.
The drama’s writing stayed dark but believable. It didn’t exaggerate emotions. The characters acted from pain, guilt, and greed — nothing felt forced. The show also didn’t try to justify anyone. Everyone here is broken, and the story doesn’t hide that.
Still, it leaves questions. Can Eun-soo ever find peace? Will Lee Kyung’s revenge give her freedom or destroy her? And how far will Jun-hyeon go before realizing revenge makes him no different from the people he hates?

Ending
Episode 9 pushed “Walking on Thin Ice” closer to its breaking point. Every thread — truth, guilt, and love — is about to snap. The final moments promised that nothing good can come from lies that deep.
In short, Walking on Thin Ice episode 9 review and analysis captures a story where revenge feels heavier than truth. Each scene built tension quietly.
Every character walked toward their own ruin, and the drama made sure viewers felt every step. It wasn’t about shock. It was about consequence — and that’s what made this episode so powerful.