Yunxiu, a nine-tailed fox and gold-medal mission agent, is forced out of retirement by a calamity and made to take on “bad woman missions” by a cute System. A cold, aloof master mistreats her demonic disciple; a willful princess toys with a hostage prince; an ambitious empress dowager uses a powerful minister... She only wanted to live freely, but in every world, an obsessive, unhinged man clings to her and won't let go. It turns out they're all fragments of the same supreme deity's soul, and their bone-deep obsession goes far beyond a single mission.
World One: Cold, otherworldly master vs. disciple with demonic bones
World Two: Overbearing, possessive stepbrother vs. naive stepsister
World Three: Miserable hostage prince from an enemy kingdom vs. willful, headstrong eldest princess
World Four: Paranoid, possessive minister vs. ambitious empress dowager
World Five: Leader of the interstellar anti-empire alliance vs. the Empire's Shield, its God of War