While the Masters Sleep: Samuel and Lourdes are a humble marriage that go out of their way taking care of the land and their Lord properties. The owner of the house is Víctor, an ancient vampire that only feeds himself with the blood of bad people. Generation over generation, Samuel's family has been in charge of the duty of protecting their Lord but now, Samuel and Lourdes have two problems: they can not have a baby and a mysterious vampire relative arrives to the place turning everything upside down.