Corpses are found drained of blood. The puncture wounds on the corpse's neck lead Thursday to look at vampire legends and folklore. Daniel discovers that the killer has a penchant for a specific blood type - and Thursday happens to be of that blood type.

Charred limbs and ashes... these are what remain of the victims in Daniel's most recent case. Thursday believes that spontaneous human combustion is what caused their death, but Daniel thinks otherwise. However, he finds himself considering Thursday's theories when an old friend is involved in the case.