Kye-na, an average woman in her late twenties, holds a steady job and a committed boyfriend, Ji-myoung. Yet instead of feeling content, she constantly faces uncertainty, confusion and anxiety. While struggling with personal relationships and life's woes, Kye-na finally embarks for New Zealand despite everyone’s dissuasion on leaving her home behind.

Zoo-young and her contrabass are wandering in space after leaving their planet due to a food shortage. Meanwhile, Earth is overflowing with plastic, their staple food, and Pu-reum lives there. Pu-reum's song guides Zoo-young and the contrabass back to Earth, and after a long journey toward each other, they finally meet.