Synopsis

From Eve, the progenitor of humankind, springs a terrible new horror: a black worm-slug capable of invading the mind and compelling its host to commit violence. Sam and Dean find themselves compelled to join forces with Bobby Singer and Rufus MacLeod, tracking the creature to an abandoned cannery. There, they discover Gwen Campbell and Samuel Eldridge are also present, drawn by the same dread. Yet, none of them can discern the monster’s true nature, or who it hides within.