Title: Mercy
Rating: PG-13
Word Count: 11,171
Prompt: spn_halloween #9, "There is a supernatural serial killer on the loose, but due to previous pranks, the police don't believe the boys, and John is MIA."
Summary: En route to a potential hunt, Dean and Sam are forced to stop for a while as Sam's visions manifest themselves in an entirely new way, forcing them in the direction of a supernatural being and not letting them leave until it's taken care of.

Author's Note: This story takes place between 1x19 Provenance and 1x20 Dead Man's Blood. Due to the lack of a definite timeline, I'm saying Provenance was in August or September with Dead Man's Blood in late October.

For arabella_hope because it's all her fault and pandoraiam because she supplied me with all the sites I used for research.

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( With a hard punch on the shoulder Sam was startled awake, a crick in his neck and the right side of his face feeling numb from the way he'd ended up sleeping against the window. )