Minseo, an elementary school boy, spends his day speaking into his earphones as if he is on a phone call. From his walk home after school to spending time with friends, returning home alone to do homework, and watching TV, his ordinary yet joyful day unfolds through his voice. Late at night, his mother returns home, puts the sleeping child to bed, and listens to the voice recordings of Minseo's day left on his phone. Though they exist in different moments in time, the two remain connected through Minseo’s voice.