The story unfolds as Yong-jun learns to communicate using to connect with Yeo-reum, who is the devoted older sister of Ga-eul ( Kim Min-ju ), a deaf swimmer training for the Olympics. The film explores themes of:

: A major theme is the weight of expectations. While Ga-eul trains for the Olympics, Yeo-reum’s own identity is largely eclipsed by her role as a caregiver. The story tracks her journey from living through her sister’s goals to discovering her own aspirations. Youth and Transition