Ariel, the only daughter of a respectable family.

However, she soon realized her body had been swapped with that of Gray, a young serial killer.

Ariel cooperates with the investigators who were pursuing Gray, and begins to study magic and swordsmanship to reclaim her own body.

However, Gray's master lurks in the shadows, a wizard wielding immense, terrifying magical power.

Past murders and ongoing brutal incidents.

Everything stemmed from a particular incident that occurred in the past.