Helen had been diagnosed with kidney failure, and her boyfriend Ayden had anonymously donated one of his kidneys to her. Following the donation, Ayden relied on a low-cost artificial kidney to sustain his life. He broke up with Helen, burdened by public shame that drove him out of the city. Years later, when doctors declared Ayden on the brink of death due to his inability to afford a new artificial kidney, he encountered Helen again. By then, she had a new boyfriend, Ethan, whom she treated as Ayden's stand-in and lavished with affection. To prove his irreplaceable place in Helen's heart, Ethan constantly targeted Ayden. Meanwhile, Helen, due to past misunderstandings, allowed Ethan to subject Ayden to relentless torment. In the end, as Ayden's life neared its end, he chose to let go of his grievances and move on. Those who had wronged him were brought to justice, and Ayden was given a second chance at life.