Sungjong lives in a world where everyone gets a chance to live another life. Legends say it started because of one's good or bad karma, but no one knows for certain. After several lives, he meets someone special...with an infinity symbol, instead of the typical, evergrowing tattoos that show the number of lives. Myungsoo is different. 

Zelo gets rescued by a person in a cape while in America. Would you believe that a superhero had just saved your life? Neither did Zelo...at first. He's in more danger than he could ever imagine, and there's only one person who can save him.