An old adversary makes a return appearance in Katie's life, and she's on the hunt to bring him down once and for all. At the same time, an old friend winds up in the hospital with a mysterious malady, and his doctor, who also happens to be his brother, doesn't seem to be helping him, and Katie wants to find out why. Can she solve the two mysteries in time? Find out in the 21st Katie Carter Mystery Story - Katie and the Return of the Vampire