After a car accident, Areum finds herself in the unfamiliar world of Soltera. Mistaken for a vampire by a slave dealer, she is sold to the residence of a duke. The only known vampire on the planet, Lord Millard, becomes her new owner. Determined to stay alive, Areum becomes Lord Millard's caretaker and promises to serve him loyally. However, as she tries to bond with him, she notices a surprising change in his behavior towards her.