NOTE: This k-drama Fiction is written in English

What if your past was still hunting you?

The last thing Lee Ji-won remembers is falling.

Then she wakes up five years in the past, watching memories dissolve like photographs in reverse. Her wedding unravels. Her career rewinds. The man she loves becomes a stranger again. And with each passing day lived backward, Ji-won realizes something horrifying: she's not the only one who remembers.

Someone else is living this reversed timeline. Someone who's been waiting for her. And they're not trying to change the past—they're trying to erase it.

As Ji-won races against time flowing the wrong way, she discovers fragmented clues scattered across a life she's already lived: cryptic messages hidden in old journals, a phone number that shouldn't exist, and a choice she made years ago that someone desperately wants undone. The closer she gets to the truth of why time reversed, the more dangerous her present becomes.

In a world where tomorrow already happened, Ji-won must do the impossible: move forward while everyone else is moving back. Because the only way to escape this loop is to reach the moment before it all started—and confront the person willing to destroy everything just to change one decision.

Time is running out. It always was.