Two people embark on a solo journey along the Yeongdong Line. Before them, the blue sea unfolds, and the wind stirs old memories, much like the lingering ache in their hearts after enduring life's hardships. With nowhere to turn, they meet by chance over a drink of soju and beer, and fueled by their intoxication, they slowly begin to connect. That night, they feel as if they've returned to the hearts of their youth...