When the BAU teem meets the Winchesters posing as FBI agents on a case, the last thing Dr Spencer Reid expected was to discover that monsters were real and that a very handsome man named Sam hunted them for a living. After Spencer gets his life saved by the hunter, the two young men exchange email addresses, one hoping to learn a bit more about spirits and demons while the other saw this as an opportunity to have an actual FBI agent's contact details. Obviously, they'll both get so much more than that.

When a serial murder case comes to the BAU they take up the case and start investigating. But what happens when the killing stops and they find something they didn't expect? Sam and Dean work a simple haunting case and finish within a few days, but what they're not expecting are the feds.

The FBI team BAU has been searching for over two months for an unsub, who can for many murders of dead women with special vampire and sectarian tendencies. The case is almost at a lost, when suddenly the some mysterious informant calls with new information...