Jaehyun, a 15-year-old boy, hears about his father's death and goes on a journey to understand his death with Chanbin, who seems to have already grown up.

Jaehyun and his mother Seong-ju are collapsing due to his father Young-woo who left the house without a sound. Eventually, he moved to his uncle's house, and Seongju made a living there by running a study room. Jaehyun meets Chanbin, who has a mature and superhuman atmosphere in his new neighborhood. Chan-bin goes to Seongju's study room, and the two, who had no friends, are getting closer and more curious about each other closer. Young-woo suddenly returned to Jaehyun, who was slowly finding stability. He leaves Jaehyun with his camera and leaves again. Soon after, news of Young-woo's obituary is heard, and Jaehyun is again eroded by great confusion and sadness. At Chanbin's suggestion, the two begin a trip to understand Young-woo's death with a photo in the camera as a clue.

There is a time when I was ashamed and wanted to hide things countless times at least once. Days when I was distressed by the lack of a countermeasure of "no" while asking the question, "Why don't I have that?" I would like to introduce someone who will still be in that time to a friend who can share embarrassment together.