She is the Daughter of Hades, what could go wrong?
Hidden in the Underworld by her father, Hades, for thousands of years, Chrys wishes she could see the human world once in her life. However, she knows that if anyone finds her, and discovers her dichotomous power over life and death, they will destroy her. So she has remained in the Underworld Palace for her entire life, making very little friends, and bored as hell, no pun intended.
Huntley never imagined that after he died, he would wake up with a magnificent girl standing over him, especially one claiming to be the daughter of Hades. The Greek gods are real, and the god of the Underworld apparently has a daughter. Instead of sending him to the afterlife, she keeps him around to be her "tutor", even though he obviously doesn't have any expertise in anything other than being a punk. It is clear she wants him around to be her friend, and it is a task Huntley has no problem taking.
But after a big fight with her mother Persephone, Chrys can't take it anymore and has to see what the human world is all about. It would just be for a couple of days, so nothing could go wrong, right?