Inuyasha and Sesshormaru have a sister named Crystal. She is a half demon. Despite her human side Sesshormaru will protect her with his life. As feeling start to develop between Crystal and Koga, something happens that could change everyone's lives forever.

Koga of the wolf demon tribe was just moving on from loving Kagome when her cousin Kary but as Kagome calls her Angel.When Kagome was going through the bone eater's well Kary fell through and when she landed she was in the feudal era.