Season
- Season 1 2020-10-26
Episode
- Episode 1: Disappeared
- Episode 2: Devastated
- Episode 3: Call from the Future
- Episode 4: Prove It To Me!
- Episode 5: The Kidnapper
- Episode 6: The Murderer
- Episode 7: The Chase
- Episode 8: The Mole
- Episode 9: The Suspicion
- Episode 10: The Crucial Place
- Episode 11: The Dead Body
- Episode 12: The Murder
- Episode 13: Kim Jin Ho Takes His Life
- Episode 14: The Clues
- Episode 15: The Gap
- Episode 16: The Arrest
- Episode 17: The Cost of Happiness
- Episode 18: The Only Hope
- Episode 19: Victim's Message
- Episode 20: Ae Ri's Guess
- Episode 21: The Assistance
- Episode 22: Seo Jin's Plan
- Episode 23: Ae Ri's Death
- Episode 24: A Phone Call
- Episode 25: Song Ja Goes Missing
- Episode 26: Seo Jin Gets Arrested
- Episode 27: Do Kyun Threatens Seo Jin
- Episode 28: Hyun Chae Tries to Take Her Revenge
- Episode 29: One Mishap After Another
- Episode 30: The Package
- Episode 31: The Sacrifice
- Episode 32: The Last Call
Kairos Season 1 The Cost of Happiness
6.1/10 users Kim Seo-Jin is a man who is driven only to achieve success in his life. Thanks to his efforts, he is the youngest executive at his company. His life is perfect, with his beautiful violinist wife Kang Hyun-Chae and a daughter. His wonderful life comes to a halt when his young daughter is kidnapped. He falls deep into despair. To change the past, when his daughter was kidnapped, he contacts Han Ae-Ri approximately one month in the past.
Han Ae-Ri has busy days with her studies and working a part-time job to make enough money to pay for her sick mother's operation. One day, her mother suddenly goes missing. Han Ae-Ri falls into despair, when Kim Seo-Jin from the future contacts her.
