S1 E1 • Samil Supermarket Case

One day, a guy enters the police station and claims that he’s the real suspect of the Samil Supermarket murder case. He says the suspect imprisoned in jail for 12 years is innocent and he is making a confession only because he was forced to. Apparently, he has been blackmailed by someone that everyone around him will find out what he did if he doesn’t confess.

Première diffusion : 22 mai 2017

S1 E2 • I Will Catch That Guy Who Hurt You

Yu Na is upset that Soo Ji didn’t keep her promise. Meanwhile, Yu Na leaves her grandmother. On her way out, she meets the boy from the volunteer service.

Première diffusion : 22 mai 2017

S1 E3 • Interrogation

The police find the evidence to prove that Si Wan was there when Yu Na fell off from the building. They begin the interrogation, but he claims that Yu Na insisted on climbing up the guardrail and slipped. Soo Ji gets so frustrated because she knows he’s the suspect.

Première diffusion : 23 mai 2017

S1 E4 • I Killed Her

Soo Ji is torn and frustrated that although she knows who killed her daughter, she cannot do anything to take him in. She decides to take matters into her own hands and goes to Si Wan’s high school. Meanwhile, Soon Ae learns that Soo Ji hasn’t returned her gun.

Première diffusion : 23 mai 2017

S1 E5 • For Revenge

Soo Ji’s violent action makes the public completely forget about how her daughter died and turns Si Wan into a victim. Knowing that she can’t catch him alone, she decides to work for Bo Mi and Kyung Soo’s boss and wait for the right timing.

Première diffusion : 29 mai 2017

S1 E6 • It's His Daughter

Soo Ji, Bo Mi, and Kyung Soo plot a plan in order to enter Woo Sung’s house. They also find out that Woo Sung has a wife, a daughter, and a girlfriend. They also find out that Woo Sung is planning to abduct someone.

Première diffusion : 29 mai 2017

S1 E7 • What Are You Up To?

Soo Ji puts herself into a dangerous chase with the police as she can’t just ignore Se Bom from being kidnapped. The other members join her, and it causes their identities to be revealed. Do Han becomes very anxious if his revenge plan will be ruined because of Soo Ji.

Première diffusion : 30 mai 2017

S1 E8 • You're The Only One Who Can Catch Woo Sung

Soo Ji figures out where Woo Sung’s daughter, Se Bom, is located. She successfully rescues her and brings her back to her mother. Meanwhile, the Guardian locate Woo Sung’s whereabouts.

Première diffusion : 30 mai 2017

S1 E9 • Jang Soo's Case

Lee Jang Soo is caught for his special robbery and rape 15 years after the incident. However, the court declares him not guilty because the statute of limitation is expired and there is not enough evidence to prove him guilty. Soo Ji and the others start their mission to make him pay for what he’s done.

Première diffusion : 5 juin 2017

S1 E10 • I Will Pray for Your Daughter

Do Han joins the Joint Investigation HQ to catch Soo Ji. However, she is not easy to catch, thanks to the help of Bo Mi and Kyung Soo. Meanwhile, Soo Ji secretly follows Kyung Soo into a church.

Première diffusion : 5 juin 2017

S1 E11 • Leader's Identity

Soo Ji tells the other members that the leader got them into a trap first and later saved them from being caught by the police. Soo Ji insists that it’s important to find him and know what he is up to. That’s when they receive a mission related to Bo Mi.

Première diffusion : 6 juin 2017

S1 E12 • I Know Who the Killer Is

Soo Ji and Kyung Soo get involved in Bo Mi’s family’s murder case. They decide to help her find her kill. Meanwhile, through the cameras, Bo Mi witnesses her own uncle being murdered.

Première diffusion : 6 juin 2017

S1 E13 • Save Her

Soo Ji risks her own safety by exposing herself to create a diversion in hope of saving Bo Mi’s life. Kyung Soo keeps on chasing the real culprit from a distance. Meanwhile, Do Han is quite surprised by the circumstance that Soo Ji is in but comes up with a new strategy.

Première diffusion : 12 juin 2017

S1 E14 • Jang Do Han Found Out

Soo Ji is wounded, and through the monitor, Bo Mi sees her collapsed on the ground. Bo Mi makes a big decision and goes out into the world to save her. Meanwhile, Do Han finds Soo Ji.

Première diffusion : 12 juin 2017

S1 E15 • Ready to Kill

Soo Ji, Kyung Soo and Bo Mi are in one place all together for the first time. They all head over to Kyung Soo’s office and plan for their next move. Bo Mi uses herself as a bait to lure Kang Jin Ku to the crime scene. Meanwhile, the police arrested Jin Ku but let him go due to lack of evidence.

Première diffusion : 13 juin 2017

S1 E16 • Will You Keep Looking for Our Leader?

Soo Ji wakes up and finds out that Bo Mi has taken her gun. Chief Prosecutor Yoon invites Do Han to his house and introduces him to his family. Meanwhile, Soo Ji goes back to the church.

Première diffusion : 13 juin 2017

S1 E17 • She Wants to Meet You

Eun Joong becomes to doubt Do Han more as he acts more suspiciously. Soo Ji sneaks into Do Han’s house in order to find out who he is. Meanwhile, Soo Ji, Kyung Soo, and Bo Mi receive a new mission that involves Kyung Soo’s mother.

Première diffusion : 19 juin 2017

S1 E18 • He's Like Us

Kwan Woo visits his father and promises to bring him home soon. Soo Ji secretly goes into Kwan Woo’s place and becomes more certain that he is their leader. Meanwhile, both Do Han and Kwan Woo receive text messages from each other.

Première diffusion : 19 juin 2017

S1 E19 • You Two Are the Same

Soo Ji gets Do Han to tell her what she wants to know. In order to flee from the police, the two fake a hostage situation. Soo Ji, Do Han, Kyung Soo, and Bo Mi are finally gathered at the same spot.

Première diffusion : 20 juin 2017

S1 E20 • Your Daughter Is Still Okay

Seung Ro becomes more and more suspicious of Do Han. In order to bait him, Seung Ro tells him to set a trap to catch Soo Ji. Do Han goes to Soo Ji and tells her that her mother is ill.

Première diffusion : 20 juin 2017

S1 E21 • I Can't Hate Him

With Do Han’s help, Soo Ji gets to reunite with her mother. Do Han is filled with guilt, knowing that he could have saved Yu Na. Meanwhile, the guardians set up a trap to reveal Viper’s identity.

Première diffusion : 26 juin 2017

S1 E22 • I'm Framing Myself

Eun Joong reveals to Do Han what he knows. He also tells him that he’ll turn himself in and asks Do Han to frame him in order to catch Yoon Seung Ro. Do Han agrees to hold hands with him. Meanwhile, Do Han encourages suspicion in Byung Jae regarding Seung Ro.

Première diffusion : 26 juin 2017

S1 E23 • I Am Lee Shin Hyuk's Son

The guardians track down Detective Nam, and Kyung Soo reunites with his mother at last. With Detective Nam in custody, Do Han and Seung Ro each tries to make the best out of the given situation. Meanwhile, Soo Ji gets a bad feeling when she sees Si Wan and Se Won getting along.

Première diffusion : 27 juin 2017

S1 E24 • The Delivery Woman

Soo Ji disguises herself as a delivery woman and goes to Seung Ro’s house. Si Wan befriends Soon Ae’s daughter, and tries to get closer to her. Meanwhile, Do Han calls Eun Joong to tell him that Eun Joong’s father has come to the building where Byung Jae is incarcerated.

Première diffusion : 27 juin 2017

S1 E25 • There Is a Witness

Do Han gets arrested for charges accusing him of fabrication of official documents. Along with Kwan Woo, Do Han gets pressured to reveal his identity. When the hearing starts, the guardians nervously wait and see.

Première diffusion : 3 juillet 2017

S1 E26 • The Delivery Woman

Seung Ro tells Do Han that in exchange for letting Do Han's father go, Do Han shouldn't testify for Soo Ji. However, Do Han goes against him and testifies, saying that he saw Si Wan with Yu Na the day she died. Meanwhile, Se Won goes over to Si Wan’s house and gets a surprise.

Première diffusion : 3 juillet 2017

S1 E27 • The Hearing

At the hearing, Do Han testifies against Seung Ro. However, without any solid evidence, he has only his words to back his claims. Knowing that it is the only way, Do Han chooses to go down with Seung Ro by making a confession of his crime.

Première diffusion : 4 juillet 2017

S1 E28 • I'll Tell the Police about Yu Na

At the hearing, Seung Ro gets an unfortunate surprise. Turns out, Ms. Lee and Prosecutor Jang disguised Byung Jae’s suicide. Byung Jae steps into the hearing unannounced.

Première diffusion : 4 juillet 2017

S1 E29 • The Showdown

When Soo Ji turns herself in, she runs into Si Wan who has been summoned for an interrogation. She senses something isn’t right about the whole situation. Meanwhile, Do Han receives a message from Si Wan.

Première diffusion : 10 juillet 2017

S1 E30 • The Game Is Too Fun to Stop

Si Wan threatens Soon Ae with Se Won, and Soon Ae gives Soo Ji the keys to her handcuffs. He tells Soon Ae that if she wants her daughter back alive, she needs to kill Soo Ji. Meanwhile, the Guardians find out what Si Wan has been up to.

Première diffusion : 10 juillet 2017

S1 E31 • Captain, It's Been A Bad Day!

Soon Ae has no choice but to kill Soo Ji in order to save her own daughter. Fallen in a dilemma, Soon Ae hesitates. When Do Han arrives at the scene, he tries to negotiate with Si Wan in order to put an end to everything.

Première diffusion : 11 juillet 2017

S1 E32 • Are You Alive?

Si Wan and Prosecutor Jang are in a coma after their fall. A year passes by, and the three Guardians are still working together. Prosecutor Kim maintains his sharp and righteous character, but also receives help from the Guardians.

Première diffusion : 11 juillet 2017