An unfathomable incident introduces a genius engineer to dangerous secrets of the world — and to a woman from the future who's come looking for him.

Joo Joong-won is the arrogant, greedy CEO of Kingdom, a conglomerate that includes a supermall and a hotel. "Ghost whisperer” Tae Gong-shil, is a misunderstood outcast who can't keep a boyfriend or a job since a near death experience left her seeing needy ghosts. She feels compelled to help them resolve their earthly issues so they can move on to the afterlife... and he feels compelled to think she's crazy. Soon their lives merge into a complicated web of hijinx, misunderstandings, and... yes, love.

A mermaid from the Joseon period ends up in present-day Seoul, where she crosses paths with a swindler who may have ties to someone from her past.