Synopsis:
Sam dreams that Dean shoots a man. Reality begins to mirror the dream when the brothers travel to Crater Lake, Oregon, where a blood-borne demon virus is wreaking havoc. When one of the townspeople transfers the virus to Sam, Dean is forced to consider killing his own brother. But, ominously, Sam demonstrates an immunity to the disease. Soon after, the townspeople vanish into thin air and Sam and Dean are left with their own demons.
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