I Am Immortal tells the story of Ridikh, a man with the ability to heal quickly and live eternally. After a serious accident at the age of ten, he realized that he was different from other humans. Ridikh lives a long and lonely life, moving from place to place to hide his secret while witnessing the world change over time. In the 21st century, Ridikh attempts to lead a normal life in a big city, working in an old library filled with antique books. Despite his efforts to blend in, the rapid changes in technology and society make it difficult for him to adapt. Everything changes when he meets Aria, a young woman who becomes his close friend. Through his relationship with Aria, Ridikh feels human again and finds comfort in an ever-changing world.