I didn't even have a quiet moment to think. Because even in such moments, I lost my memory. The aloof Eun Dan-oh leads a seemingly carefree life as the daughter of a wealthy family. She attends one of the country's most prestigious academies and is engaged to her childhood sweetheart, Baek Kyeong. Yet, not everything that glitters is gold - for Baek Kyeong treats her like dirt, and a congenital heart defect could soon cost Dan-oh her life. As if that weren't enough, the young student has recently been struggling with memory gaps and bizarre hallucinations. Weeks suddenly pass in the blink of an eye. It is only when Dan-oh accidentally flips through the pages of an unassuming manhwa that the bitter truth unfolds before her...