National Route 1

Tae-san, a young team leader at Janghyeon Construction, arrives in Jochiwon to prevent flooding from the Heungbok Reservoir—only to unexpectedly reunite with his first love from college, Su-yeon. "She's still the same, Lee Su-yeon... thoughtful, cautious, detached." As Tae-san feels his old emotions stirring, Su-yeon tries to stay steady. The only thing that has changed is the decade that has passed without each other—the time that turned them into adults. "Take your time to hesitate and think it through. I'll wait for you." Because the invisible line that once stood between us... I crossed it long ago.