Saintess of Justice

Multiple Victims, And a serial killer on the loose. As a detective it's my duty to solve crimes, no matter the person. So how the hell did this happen??? Being transmitted into the main heroine, a saintness?!? Seriously couldn't I have been transmitted into a side character or something?! That killer's all to blame, I'll make him repent his action till his last breath but first… How am I gonna get out of this?!