Ki Ha-neul, who lost his memory in a traffic accident, reunites with Yeo Sae-byeok ten years later—his childhood sweetheart turned fated rival. "We're not friends. We're lovers." Saebyeok's shocking declaration plunges Ha-neul into utter confusion. The lost decade, vanished from his memory. Love, buried like dust, begins to slowly awaken from beyond that void.