Taehwa, a young man in his early twenties, has been battling lung disease for years. After undergoing multiple failed surgeries, he finally received a new lung transplant from his father, who had committed a hit-and-run the night before the surgery.
However, Taehwa's life took an unexpected turn when he discovered that the person who had given him the new lung was actually his father, who had been involved in a hit-and-run accident the day before.
Feeling guilty for not being able to prevent his father from causing harm, Taehwa set out on a mission to find the victim's daughter, Miji. He knew that she might be struggling with her own guilt and pain, and he wanted to make amends by helping her heal.
As Taehwa searched for Miji, he encountered many obstacles and challenges along the way. But through perseverance and determination, he finally found her, and together they worked to overcome their past traumas and move forward.
In the end, Taehwa and Miji were able to mend their relationships and create a new life for themselves, free from the burden of their past mistakes.