Years ago, Joong and Dunk shared a love so certain, they marked it with matching sunflower tattoos-symbols of a forever that felt unshakable. But something-or someone -ripped them apart, leaving silence where promises once lived. Now, Joong runs a quiet flower shop, hiding pieces of the past beneath petals and stems. Dunk, once his whole world, has become a name whispered only in memory... until fate leads Joong to Inked Reverie, the tattoo studio owned by the very person he's spent years trying to forget. When Joong walks in seeking to erase the mark of their love, he doesn't expect the artist waiting behind the chair. Unspoken words, lingering stares, and half-buried truths begin to crack the walls they've built. But something still lingers in the shadows of their story-something that demands to be uncovered before anything new can begin. And as their paths intertwine once more, the question looms: were they really torn apart by time... or by something far more deliberate?

In a small coastal town, Joong, a reserved university student in 2025, starts waking up in a stranger's body. The stranger is Dunk, a carefree high school boy living in the same town-but in the year 1995. Neither understands why this is happening, but as they experience each other's lives, they begin leaving messages in notebooks, hidden locations, and even old VHS tapes, desperate to communicate. As they grow closer, Joong discovers a tragic truth: Dunk's town is destined to be destroyed by a tsunami in just a few months. No records of him exist in the present, as if he never survived. Joong races against time, using his connection to warn Dunk and change the past. However, altering history proves difficult-each time they attempt, the swap becomes unstable, threatening to sever their connection forever. With the final swap looming, Joong takes a desperate risk, leaving behind a crucial message in the one place he knows will survive the disaster. When Dunk finds it, he realizes he has one chance to evacuate the town. But even if he succeeds, will Joong ever remember him in his timeline? Or will their fates unravel like forgotten threads in time?