Seo Kang-joon

Role: Kim Sae-ha

A government worker discovers a mysterious woman from the future is connected to a dangerous fugitive and the fate of humanity.

Role: Kim Sae-ha

Thirty years ago, a mysterious figure called The Ghost appeared and saved humanity from solar winds that would have destroyed all electronics on Earth — and the…

Role: Im Eun-seob

A cellist escapes a painful life in Seoul and returns to her rural hometown, where a quiet bookstore owner draws her slowly back toward life, warmth, and forgot…

Role: Kim Young-goon

Three people with shattered lives — a detective whose wife was murdered, an internal affairs officer whose career was destroyed by corruption, and a crime profi…

Role: Nam Shin III (android) / Nam Shin (human)

A chaebol heir falls into a coma, and his genius scientist mother sends his android double — identical in face and memories — to infiltrate the company and surv…

Role: Baek In-ho

A hardworking scholarship student becomes entangled with the eerily perfect senior who seems to engineer trouble for people he dislikes — then inexplicably star…