Han Sejoo is a popular writer who needs nothing but more time to write his novels that are recognized and loved by the public. Jeon Seol, the legendary girl being good at everything, is a big fan of Sejoo and she would give anything to meet with Sejoo. And one day, she is asked to deliver a mysterious box to Sejoo.

Seol subdues the intruder that tries to harm Sejoo. While grabbing the gun, she sees her past life. The police arrive and the stalker gets arrested. Apparently, the intruder is the culprit of another shooting incident. However, he suddenly commits suicide while being locked up in his prison cell. The public goes on a spree with rumors of how Sejoo’s writing is tightly connected with the crimes of the culprit.

Sejoo is unable to write anything while he’s in his slump. He almost gets himself killed in an accident. At the detrimental moment, Seol comes to help. She takes Sejoo to her father’s cabin. Sejoo keeps an eye out for any kind of danger and coincidently saves Seol from harm. Sejoo keeps on having weird dreams and Seol always appears in them.

Sejoo is confused as Yoo Jino keeps following him and saying he is Sejoo’s ghost writer. Sejoo finally finds out that Seol has tried to be helpful while they get caught and reported as lovers. Jino finds out that Sejoo was a ghost writer for Baek Taemin before. Sejoo finds out that there were encounters between Seol and Taemin. He starts to feel a bit jealous.

Sejoo and Seol are highlighted by the media and public mistaken for having a relationship. Seol keeps on getting phone calls from Sejoo’s fans every day, who threaten her welfare. Still having the writer’s block, Sejoo is unable to write out any good quality episodes for his serial material. In the end, he decides to hold a conference to make an announce about his ghost writer.

Sejoo finally finds out Jino is an actual ghost, and Jino explains that he, Sejoo, and Seol were friends in the past. However, no one believes Sejoo sees Jino, the ghost. Jino tries to persuade Sejoo to finish the novel “Chicago Typewriter” together saying that the novel was actually written by Sejoo 80 years ago.

Sejoo rejects the idea of continuing with his writing but gets concerned that it might ruin his career forever. Seol brings Gyeonwoo to Taemin, but Sejoo takes Gyeonwoo away. Sejoo finally accepts the idea of writing with Jino under one condition: Sejoo must keep men away from Seol.

Sejoo is torn between just pretending to like Seol or really having a feeling for her. The dilemma all starts because Jino asks Sejoo to be around her to protect and care for her. Sejoo needs a story to write, and Jino wants to get closer to Seol. They end up writing a contract to settle their needs. Sejoo feels awkward because he does not know how to act around Seol and makes her upset by saying the wrong things.

Jino gets amazed at how much Seoul has changed and asks Sejoo to go on a tour around the city. They bring Seol along with them. When Jino sees that Seoul has finally gained the independence he longed for, he wishes to live his youth again in 2017. Meanwhile, Baek Doha tells Taemin that Sejoo has the original copy of “Fate”. Doha suggests Taemin to start anew, but Taemin refuses.

As Jino and Sejoo continue writing the novel, Sejoo remembers the past more. Seol’s mother comes back and tells Seol not to cross paths with the ill-fated people. She also confesses that she can see the past life as well. Meanwhile, Taemin visits Sejoo and begs for the first draft of “Fate”.

Seol decides to leave Sejoo because she believes that they are ill-fated. However, Sejoo doesn’t let her go easily. Seol tells Taemin that she can’t help with his work and Taemin gets furious. Meanwhile, Sejoo gets invited by Ms. Hong Sohee to have dinner at her house. There, Sejoo meets Doha and tells him that he gave Taemin the first draft of “Fate”.

Seol decides to leave Sejoo because she believes that they are ill-fated. However, Sejoo doesn’t let her go easily. Seol tells Taemin that she can’t help with his work and Taemin gets furious. Meanwhile, Sejoo gets invited by Ms. Hong Sohee to have dinner at her house. There, Sejoo meets Doha and tells him that he gave Taemin the first draft of “Fate”.

Seol and Sejoo travel to the past and meet their past selves. After escaping the gunfight that broke out in Gyeongseong, Seol and Sejoo find out that there is a secret agent hiding among Joseon Youth Alliance. Meanwhile, Jo Sangmi continues her plot against Seol, and Sejoo finds out that Sangmi’s target is Seol, not him.

Seol’s first morning at Sejoo’s house turns into a fierce competition between Jino and Sejoo. They try their best to win Seol’s heart. Meanwhile, Taemin makes Sangmi to lure Seol into her house and makes Seol a hostage. Sejoo runs to rescue Seol but finds Taemin waiting for him.

Ryu Soohyeon is captured and tortured by Heo Youngmin. When Shin Yool finds out that Soohyeon had been captured, he decides to go and save her. However, Seo Hwiyoung does not allow him to go. Meanwhile, Taemin flees from the scene and leaves Sejoo injured. The police break into Sangmi’s house and finds Seol tied up to a chair.

When Soohyeon learns that Hwiyoung was captured and killed, she goes her own ways to execute the wrongdoers. She assassinates every betrayer, including Shin Yool. In the present time, Jino finds out how he was killed in his past life and gets shocked. Jino’s body keeps flickering, signaling that it’s almost time for him to leave.