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. 

Myungsoo and Sungjong see one another one year after a terrible tragedy that changed them both forever. They were so strong together, before that fateful day. Now they will need to heal from it. Myungsoo is also determined to find and kill the creature that took their friend's life. It may have been classified as an accident, but it was anything but...Myungsoo and Sungjong both saw what really happened, and they will get to the bottom of this, unless they die first...

Sungyeol and Qri meet at work and have more chemistry than Sungyeol thought they would. Sometimes age isn't everything.