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On the day Gon and Da In move into the new place, they first meet So Young. But Gon thinks he has met her before. And on the day Gon returns to the prosecutors' office, he receives a phone call from Se Hwang. In the meantime, a prosecutor is murdered, and So Young finds something at the crime scene.

After being told that Da In is home alone, Gon leaves his office to see Da In. Also, Gon meets with a witness who claims that he saw a light at the crime scene when the chief prosecutor was murdered. Thinking that some supernatural power could have caused the murder, Gon starts to look for Ko Dae Soo.

After inspecting evidence for the second murder case, there are too many unexplainable oddities. To find out more, Gon heads over to see So Young, the first witness of Kim Jae Jun. Meanwhile, Da In discovers that the bracelet she found has special powers.

Gon witnesses Dae Soo being attacked by Dong Young. Gon tries to stop Dong Young, but Dong Young is too strong to fight against. In the end, Dae Soo goes into a vegetative state. Meanwhile, Se Hwang continues trying to take the bracelet away from Da In. When Da In is home alone, one of Se Hwang's men tries to break into the house.

So Young finds out that the tattoo on Da In and Dae Soo's wrist are the same as the stamp pattern of an old amusement park. She believes that this case has something to do with the amusement park and its related case that Gu Cheol was in charge 16 years ago. When Gu Cheol in informed of what So Young has found, he seems to be shocked and somewhat anxious.

Gon is informed of a murder that is about to take place from a nameless source. When he arrives at the scene, he sees a man dying. So Young joins Gon to find evidence, and they realize that there's another person in hiding at the scene. Meanwhile, Se Hwang asks Yu Ra to carry out a mission for him.

After So Young convinces Gon to help each other to solve the case, Gon shows the magical bracelet he has acquired. With the newly found evidence, Gon visits an inmate who is well acquainted with Ko Dae Soo, the previous owner of the bracelet. From him, Gon hears about this mysterious Room of Wishes that grants any wish if one has all the magical items.

So Young and Yo Han are told to go to visit a place, and there, Yu Ra is expecting them. Yu Ra wants So Young and Yo Han to make a secret investigation into someone. Meanwhile, Gu Cheol is attacked by an unknown man, and Gon goes to save him.

Gu Cheol makes a confession in front of Gon. He says that he knows about an album that has supernatural power, and he has used it before. Gon thinks that the album could be the one that can save Da In. Meanwhile, So Young visits Dong Young. In his office, Da In finds something that looks very suspicious.

Gon finds out that Yu Na is carrying out a secret investigation into him. Meanwhile, Se Hwang schemes to set up Gon. Se Hwang orders his secretary Yoo Chul Jo to go to the police station and provoke Gon. As Se Hwang plans, Gon is worked up and goes after Chul Jo. However, Chul Jo suddenly tries to kill himself in front of Gon.

Se Hwang changes his grand plan and decides to use Gon. To send a message to Gon, Se Hwang kills Da In using one of the items he collected. Gon is devasted by losing his only family member, but the law isn’t so easy on him. They plan to arrest him regardless of his situation for being a prime suspect.

At Da In's funeral, So Young and Gon find out that Da In is disappearing in her photo as time passes by. Se Hwang sends a flower bouquet to the funeral, and that makes Gon go furious. Meanwhile, Yu Ra finds out So Young is with the female witness who saw Yoo Chul Jo dying and tries to take her away from So Young.

Gon starts to believe that Da In is still alive after he sees the lyrics that Da In has left and her melodica playing itself. Meanwhile, Deputy Prosecutor Lee Han Gil visits the funeral hall to see Gon. When he goes to the toilet alone, he gets murdered by Dong Young. And Gon and the police try to catch Dong Young.

So Young meets Bang Hak Jae and asks him to help Gon go into the Room of Wishes. And Bang Hak Jae asks for something in return. Meanwhile, Da In's coffin is carried to the crematorium. In the middle of cremation, the police notice that something is off and Gon runs away as he planned.

After running away from the police, Gon gets into an accident caused by Se Hwang. Se Hwang takes the bracelet away from gravely injured Gon and leaves him to die. Suddenly, a passerby saves Gon with another special item that has the power to heal injuries. Thanks to the mysterious man's help, Gon is able to run away from the scene. The police, however, is now on the chase to apprehend Gon.

As Gon asked, Gu Cheol is trying to find a man who drives a delivery truck and has a scar on his hand. He finally finds a man who looks like the one he and Gon are looking for. Meanwhile, So Young hears about what was found from Detective Jung's body, and she becomes certain who the murderer is.

Gu Cheol comes to visit Seung Mok again and asks for help. Meanwhile, at the orphanage, Gon and So Young find a photo of Yo Han standing in front of Dream World 16 years ago. Gon and So Young become certain that Yo Han is also involved in the fire incident at Dream World and knows about the items they're looking for.

As Se Hwang orders, Yu Na gives away the information that Se Hwang plans to transfer Bang Hak Jae to another prison. Without knowing that it's Se Hwang's scheme, So Young, Gu Cheol, and Gon plan to help Hak Jae break out of prison in the middle of transferring. Meanwhile, Se Hwang recalls his old memory at the Dream World tragedy.

After helping Hak Jae escaping from prison, Gon, Gu Cheol and So Young takes him to the church. So Young tells Dong Young to stop taking revenge on those involved in the Dream World tragedy. Gon reveals his relationship with Kim Tae Goo. Meanwhile, Se Hwang orders Yu Na to announce to the public who Gon was in the past.

Hak Jae takes So Young to the place where he hid his items. The moment they finally retrieve the items, Se Hwang's subordinates show up and threaten So Young and Hak Jae. Meanwhile, Se Hwang comes to visit the church and attacks Dong Young. He tries to fight back with his item. Then, Gon comes to the church to help Dong Young.

Seung Mok comes to the church and helps Gon and Gu Cheol move Dong Young to a safe place. Hak Jae sneaks into Se Hwang's house and tries to steal Se Hwang's items. Meanwhile, Se Hwang, who has teleported to another world, meets his father who is disguised in a clown. They talk about Se Hwang's mother and an incident that happened to the 7-year-old Se Hwang.

Gon and So Young find out that each item has a unique pattern on it, and the patterns remind Gon of what he saw in Dream World when he was young. Meanwhile, Yu Na vents out her resentment towards her father after realizing that he made a deal with Se Hwang when she fell ill.

Gon finds out that the subway crash he saw in his dreams will soon take place in real life and Se Hwang will be behind it. Gon suggests that he should distract Se Hwang and put him in the public eye. So Young says she will talk to her supervisor in the police. Meanwhile, Gu Cheol decides to sacrifice himself to protect Da In.

So Young goes to the police station on her own and tries to persuade her supervisor, Choi Ho Jun, to stop the subway crash from happening. He seems to believe what So Young tells after seeing an item's special ability. Meanwhile, Yu Na meets Gon and asks about the photo she saw in the church.

Dong Young tries to stop Se Hwang from abducting So Young, but Se Hwang seems to be too powerful to fight against. Se Hwang even uses the ring and changes into Yo Han to confuse Dong Young. So Young is taken to the room where Se Hwang displays his items. In the meantime, Hak Jae and Seung Mok are attacked late at night.

So Young, who was forced to take a whiff of Se Hwang's item, starts to act under Se Hwang's control. Meanwhile, just like what Gon saw in his dreams, a train starts to run in the opposite direction at a fast speed to Jeongjin Station. Gon heads to the train station and tries to stop the train crash from taking place.

Gon, So Young, Hak Jae, and Seung Mok evacuate the passengers from the train. When they think there's no one left in the train, they find Se Yeon with a bomb on her body. They soon realize the bomb cannot be disarmed by force. Gon decides to stay with Se Yeon until the very last moment. Meanwhile, Yu Na requests a warrant to arrest Se Hwang.

As Yu Na planned, what Se Hwang has done thus far is revealed to the public. And Yu Na gets the arrest warrant for Se Hwang and heads over to his residence. When she arrives there, she finds Mr. Cha's dead body and a key in his hand. Meanwhile, Se Hwang goes out of control and heads to where Gon is hiding.

Da In comes back safely to So Young, and they wait for Gon to return. Hak Jae decides to turn himself in and pay his dues for his crimes in prison. Meanwhile, Yu Na holds a press conference and reveals all the crimes Se Hwang has committed so far and shares the progress of the investigation by the prosecution.

A trial of Se Hwang begins. Yu Na attends the trial as the prosecutor in charge and demands that Se Hwang should face the death penalty. Se Hwang apologizes for what he has committed so far and tries to defend himself, saying that he was abused by his father as a child. Meanwhile, Da In and So Young receive a message from Gon.