Su Heng, an expelled disciple of Yunhe Temple, is a mediocre practitioner of the occult. She lives in a ruined temple and gets by on plain noodles.
Her first job: inspect the mansion of the richest man in the capital. She casually says, "There's something in the southwest corner." They dig up a vat of human bones, and the whole capital erupts.
Inside, she's panicking like crazy. On the outside, she's perfectly composed. The Regent invites her to his residence to inspect a cauldron that has been cold for three years.
Old records at Shuntian Prefecture changed the time of the fire three years ago by half a night. The steward of the Eastern Residence tells her, "Don't come back again."
Why did her master never return after saying, "Go down the mountain"? Who started that fire? Why does the ledger bear the name "Eastern"? She's here for that ledger.
