Empathetic, Generous, Considerate, Deep, Sincere and uncomplicated, words were less to describe their friendship. One was like an open book, bright and joyous. While the other was dark and bold. Nothing in this world could separate this unbreakable bond. What happens when fate decides to separate them? What happens when Kim Chai and Li Hana, who love each other like one's sisters get separated by an accident? Hana goes into a mental breakdown after losing Chai, her only family after her brother Min Sang Woo and Chai's brother, Kim Daehyun. But their life takes a 360° turn when Chai returns as a spirit to protect Hana. Only Hana was able to see her soul sister and talk to her. How will this work? Until when Chai would be able to protect Hana? What will happen next, let's find out in the book. Warning ⚠️ {Contains disturbing, accidents, blood, death, fight and mature scenes} Only read if you're comfortable.