Limited Series
Eun Chae-ni is the granddaughter of a wealthy restaurant owner. She is smart, polite, and diligent in everything she does, but because she has a different heart from others, she becomes more stubborn as she grows up, and she lives her life on thin ice that may stop at any time, dreaming of a train trip. Lee Woon-jung is a mysterious civil servant with many secrets and no social skills. He is a lonely person who can hardly be by anyone's side, but he comes to realize the meaning of 'us' after meeting Eun Chae-ni.
Episodes
1. Every Life Comes With a Surprise Twist
When news of the apocalypse spreads in Haeseong City, a cash-strapped and terminally ill young woman devises a kidnapping plot with two clumsy sidekicks.
2. Secrets Are Meant To Be Kept
Eun Chae-ni and her quirky friends Son Gyeong-hun and Kang Ro-bin are baffled by their sudden abilities. A wary Lee Un-jeong confronts his doubts.
3. Brutes and Bad Luck Do Come in Droves
The gang witnesses Un-jeong's superpower in a crisis. While they're thrilled after a daring rescue, Un-jeong senses danger nearby.
4. Boon the King Duck vs Wunderkinder
Dr. Ha Won-do returns after 20 years, chasing secrets of the Child of Eternity. Later, the gang faces an attack — still unsure of their powers.
5. All We Need Is You
Un-jeong leads a bootcamp for the gang to tap into their abilities. Chae-ni confronts her grandma about the superpower's secret.
6. All Roads Lead to Chae-ni
Chae-ni wakes up to danger — but finds a surprise lifeline in her pocket. Un-jeong plans with Gyeong-hun and Ro-bin to rescue Chae-ni.
7. The Guardians of Haeseong City Part 1
Un-jeong and the gang fight other superpowered followers, while Dr. Ha's risky plan targets Chae-ni.
8. The Guardians of Haeseong City Part 2
New Year's Eve 1999. Three misfits use their abilities to battle superpowered villains in an all-out brawl for Haeseong City.