Two people turn up dead, apparently killed by their deceased love ones. Sam convinces Dean to take Jack with them on the case, and they discover that both victims were seeing a grief counsellor, Mia Vallens. Meanwhile, Castiel meets the keeper of the void that he's trapped in.

After the Winchesters find Castiel, they reunite him with Jack. Together, the group goes to Tombstone to check out a case of grave robbing, and Jack makes a serious mistake.