Harry Potter's misfortune seems to have no end: after the war is over, a vampire transforms him. Now Harry has to live with this disease and hide it from his best friends. What will happen when Hermione invites him to dinner to meet her family? Of course her grandfather, a vampire hunter, will be there.

"AVADA KEDAVRA!" "Mr. Potter!" "He can bewitch you and drain you of every last drop of humanity you have left!" "Harry [...] I don't want to lose you". A terrible accident will disrupt the life of Harry Potter and irrevocably those around him. An unexplained rage and some personality changes will transform him. Will anyone be able to contain him or will Harry Potter lose himself?