①
Song Nanci, a top student and campus beauty in the 21st century, finds an antique watch at home one day. She resets the time and turns its knob. The world spins around her, and she ends up in the demon realm as a pitiful, homeless girl who cannot cultivate and can neither eat her fill nor keep warm.
At least the demons in this world look just like humans. If they didn't, she might not be able to stay for even a second, since she's afraid of ghosts.
Song Nanci: Give me back my cheat-filled life!
The watch suddenly speaks: "Hello. Welcome to the Demon Clan Savior System."
Song Nanci: Are you sure this pitiful girl who can't get enough to eat or stay warm and can't cultivate can save the demon clan???
②
After discovering that the watch could predict the future, she started telling fortunes for demons to earn enough to eat.
A steady stream of demons lined up every day.
She became famous in the demon realm for her fortune-telling skills. One day, a young, beautiful, lavishly dressed couple arrived at her stall. "I'd like to ask if you can figure out where our daughter is now."
Song Nanci braced herself: "Hey, give them a proper reading. These two look like trouble."
The watch replied: "There's something I don't know whether I should say, but you're their daughter."
The young fortune-teller suddenly became the demon realm's only princess.
③
Leading the demon realm in its resistance against the divine realm, Song Nanci kept a calm face, though inside she was miserable.
The demon realm was no match for the divine realm, so she planned to negotiate peace and prevent an unnecessary war.
But the crown prince of the divine realm turned out to be Xie Ji, her longtime nemesis?!!
She'd considered negotiating peace, but not with her nemesis, hey!
She activated the watch: "Quick, tell me which of us will survive, Xie Ji or me!"
The watch replied: "You will both die."
Song Nanci: "..."
The watch helpfully added: "You're married, after all. You don't have to be born together, but you should die together."
Xie Ji's voice reached her ears along with the watch's chilling words:
"To secure a hundred years of peace between the divine and demon realms, I, the crown prince, am willing to marry the demon princess."
Theme: Humans, immortals, and demons sharing the world and living in harmony.