Bloodborn (2008)

Thicker Than Water is the first part in the Vampire Diaries Trilogy. It tells the story of the Baxters, an ordinary suburban family whose world is turned upside down when their youngest becomes a vampire. Lara, a precocious teenage Goth, hates her wholesome sister, Helen. She envies her popularity, her looks and most of all, her mother's pride and affection. One day, after their 16th Birthday party, during which she is particularly humiliated by her sister's friends, Lara performs an intricate ritual in front of her Anne Rice alter involving a Margie doll and calf's heart. The next morning Helen awakens with a severe nosebleed. Then she dies in her sister's horrified arms. The family is desperately grief stricken. Lara is filled with guilt, Mom with philosophical anguish and Raymond, the gay neuro-scientist brother, with curiosity, as he discovers a strange virus in Helen's blood: one that feeds on red blood cells. Suddenly there is a knock on the door. Helen, still wearing her white body bag, is standing outside, covered in blood. It is clear that all is not well with their resurrected family member. For one thing, she requires human blood as sustenance. The family realize they must find 'sacrifices' to keep her alive. But the vegetarian cheerleader refuses to feed. She suffers gut-wrenching blood withdrawals until she blacks out and rips her victims to shreds. The first 'sacrifices' are a pair of Mormon missionaries doing the local rounds. After that it is pretty much up to Raymond, who cruises the local gay bars in search of prey. With their world crumbling around them, the Baxters find themselves lulled into atrocity, the daily carnage destroying their sense of morality while bringing them closer together as a family. And how did Helen become a vampire? What exactly are vampires? Forget everything you think you know and get ready for a completely original retelling of the most ancient of myths.