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尹泰伊去世 朴镇谦当了警察

朴镇谦与妈妈重逢 刘民赫朴镇谦相遇

老警察被时间旅行者刺杀

神秘嫌疑人石吴源出现

朴镇谦穿越回母亲死亡时空

After meeting with Lee Se Hoon, Jin Gyeom finds a murder case file with a picture of Min Hyuk, an Alice agent, from 1992. Tae Yi triggers something on the time card causing Alice to respond and show up on the scene. However, Jin Gyeom gets alerted and saves her but loses the time card to Alice. Later, Min Hyuk returns after learning a copy of the time card's program got made.

刘民赫保护尹泰伊 尹泰伊住到朴镇谦家

To keep Tae Yi safe, Jin Gyeom and Tae Yi move into the house Jin Gyeom grew up in. The police focus on identifying the suspect who tried to kill Tae Yi and his accomplice. Back at Alice, Min Hyuk believes Lee Se Hoon might have the answers needed to find The Book of Prophecy, and Seok Oh Won remains missing. Later, Tae Yi finds an article by a mathematician, which uses the same approach in the equation left by the killer.

Tae Yi finds herself in 2021 desperately looking for Jin Gyeom, but he is not alive. With the time card still in her hand, she goes to Oh Seok Won and learns that Jin Gyeom died looking for the last page of The Book of Prophecy. She also finds out she was the last person to hold the missing page. Meanwhile, the body of an unregistered time traveler disappears, and Jin Gyeom discovers he can manipulate time.

Min Hyuk shows up and saves Tae Yi from time-traveling sickness, but he doesn't tell Jin Gyeom who he really is. Min Hyuk vows to find whoever killed Tae Yi so that he can reveal to Jin Gyeom that he is his father. Tae Yi recovers and determines to change Jin Gyeom's future, but no matter what she does, it's just as she remembered it. Meanwhile, Lee Se Hoon gets released from prison.

After he goes missing for quite some time, Seok Oh Won shows up alive. However, he doesn't have much to say about his captor, and only asks to be left alone. Meanwhile, Tae Yi confronts Jin Gyeom about the security footage containing Captain Ko, and her suspicions grow around him. Min Hyuk from Alice visits once again to protect Jin Gyeom.

Captain Ko tries to fulfill his promise with Jin Gyeom but ends up losing his life. A different Seok Oh Won, one who wants to keep time travel possible, takes one step ahead of Jin Gyeom. However, now that Jin Gyeom and Tae Yi know about the last page of The Book of Prophecy, they seek it to avenge Captain Ko's death and to stop time travel.

Tae-yi and Jin-gyeom find themselves in 2010, but it doesn't seem like the past as it should be. When Jin-gyeom meets his mom Sun-young, he gets told to forget about her death. Later, Jin-gyeom and Tae-yi investigate Oh-won's death and find a secret door in his office. Meanwhile, Jin-gyeom of the past starts hearing strange demonic voices calling his name.

Jin -gyeom runs to Tae-yi's scream but gets stabbed by a mysterious cloaked killer. Strangely, at that moment, they travel through time and return to the present. Luckily, Jin-gyeom survives, and Tae-yi is unscathed. After having read the last page of The Book of Prophecy, Tae-yi meets with Min-hyuk for answers. Meanwhile, Jin-gyeom investigates the dagger used to stab him.

Tae-yi shows Jin-gyeom that the DNA analysis between the killer's and his blood are a match. Realizing that the person he has been chasing for ten years is himself, Jin-gyeom attempts to end his life. Meanwhile, Do-yeon tries to decipher the last page of The Book of Prophecy. Min-hyuk discovers Captain Go has something to do with Sun-young's death. Tae-yi disappears. Later, Jin-gyeom gets Min-hyuk to take him into Alice. When he does, Min-hyuk tricks him and enters Alice alone to save Tae-yi.

Held at gunpoint, Jin-gyeom disappears into the past. When he tries to save his mother one more time, he faces his future self once again. And despite learning that his mother is the root of all the consequences he has faced thus far, he still chooses to stand by her side. Now, left with only one decision to set things back to the way they should be, Jin-gyeom points his gun. Later, Tae-yi finds herself in the present, where no one remembers Jin-gyeom.