A young lawyer discovers through the diary of one of his ancestors that his family has served an ancient vampire for generations, so he must decide between succumbing to power and greed or doing the right thing and losing everything.

On Alejandro's graduation day, the De Mendoza family receives a visit from their most important client, Count Vladimir, who arrives in Mexico to meet the new heir and give his approval, thus forcing Alejandro's father to reveal the secret of their success and family fortune: For more than a century they have had a contract with an ancient vampire.