While on his way to work, Yuji Shin stumbled upon a weak swallow lying on the road. Despite his reluctance to take on difficult tasks, he couldn't turn a blind eye to the injured bird and immediately tended to its wounds. However, as a financially-strapped college student, Yuji couldn't keep the swallow for too long and decided to set it free.
As he released the swallow, it urged Yuji to remember Mr. Park - the person it wanted to thank for the kindness he had shown. But tracking down Mr. Park in the digital age proved to be an arduous challenge, leaving the swallow unsure how to repay the act of kindness.
Undaunted, the swallow made it their mission to express gratitude for the flying generosity that had instilled hope in them. Despite being unable to locate Mr. Park, they were determined to find a way to give back.