A year after meeting and falling for a young, mysterious vampire, Dr. Brian Preston is now living and working side-by-side with Kyle Hayes for the agency guiding vampire-human relations at a secret underground facility. As the couple adapts to the demands of Brian's career tending to vampires, Kyle's return to school and the needs of their evolving relationship, a dangerous conspiracy puts everyone they know and everything they have been working for in danger. The sequel to 2014's Bleeding Heart, Tainted Heart is Book Two in the Mi Corazón Sangrante series.