In the fantasy continent of Ilans, everyone's souls are pulled by an invisible thread, and only true soul mates can perceive each other. Erin Gray has been able to see soul lines since she was a child, but she has never been able to find her own one. In an accident, she met Noah Field, a mysterious boy, and their souls were instantly intertwined. The two are drawn into an ancient prophecy and must embark on an adventure together to find the source of destiny. On the way, they met the elf princess Lilith and the soul guardian Isaac, and faced the obstruction of the fallen knight Carlos. As the journey progresses, Erin and Noah experience trust and betrayal, life and death, and choices, and gradually uncover the truth about the soul contract. They discovered that soul mates are not only a gift from fate, but also require the courage to face inner fears and growth. In the end, the two protected each other with extremely firm beliefs, saved the entire world from the disaster of soul collapse, and also realized the miracle of destiny of soul mates.
