Wheein and Hyejin are immortals, but that's not all you need to know. They have their paths unexpectedly crossed on an eventful night in Chicago and since then, they’ve been bumping in and out of each other's lives. No matter how much they like each other, a number of obstacles - most of them which still unknown to Wheein - continue to prevent them from actually being together, thats if they will even ever be.

Seulgi spots her the moment she walks into the wedding hall. “She’s still so beautiful.” is the first thought that enters Seulgi’s mind. And judging by the way everyone seems to stop and stare, she’s pretty sure that everyone is thinking it too. Or, Seulgi and Irene meet again.