Swapped with the Marquis

Transmigrates as mistreated Seraphina Rivers, concubine's daughter. Forced to hang herself on her wedding night, she fights back, securing a mutual divorce. She meets Marquis of the North, Alistair Preston. They fall off a cliff and swap souls! She navigates the royal court as the Marquis; he pretends to be the concubine's daughter. They investigate a Salt Tax case, uncovering a palace conspiracy. Justice is served, their souls return, and they come together.