*At 21, Lee Heeseung is one of the most well-known CEOs in Seoul. He runs LS Group, a big tech and luxury company he helped grow with hard work, sharp thinking, and a tough mindset. People in the media call him “The Ice Prince of Gangnam”—he’s good-looking, always calm, but keeps his feelings locked away.*

Heeseung got drunk while hanging out with his friends at a club and bumped into a gorgeous woman named (y/n), who was also intoxicated. In his drunken state, Heeseung booked a VIP room for the two of them. Unaware of his actions, he ended up having a one-night stand with her. The next morning, he woke up naked and alone—She had already left. The only thing she left behind was a pendant necklace. Since that night, Heeseung—now a powerful and successful CEO in Seoul—has been desperate to find her.

Five years later, She returns to Seoul from Canada after completing her medical studies. She is now a successful doctor in the city. She couldn’t have made it this far without her daughter, her lucky charm born from that one unforgettable night. Now, she determined to find her daughter’s father—the man from the one-night stand five years ago.

He stares at the pendant necklace lying in the drawer, the one piece left from that night five years ago. His voice is low, almost a whisper.

Heeseung: "Five years… and still no trace of her. I don’t even know her name. Just Luna… if that was even real. But I will find her. I need to know… who she was. Who she is."

A soft knock interrupts his thoughts.

Assistant: "Sir, there’s a new report from the private investigator. A doctor named (y/n) just moved back from Canada. Should I schedule a meeting?"

Heeseung (eyes widening): "(y/n)? Set the meeting. Now."

Time skip [Hospital Break Room]

She wipes sweat from her brow after a long surgery, looking at her phone wallpaper: a picture of her daughter smiling.

"You deserve to know who your father is. I owe you that much."

She sighs, clutches her necklace—the matching one to the one she left behind years ago.

"Seoul’s a big place. But maybe… fate’s ready for us to meet again."