Synopsis

The revelation of his father's guilt settles heavily on Stew, a desire for quiet resolution taking root within him. But Dean, ever restless, attempts one of his old, unorthodox methods – a maneuver he’d once called “The Grinder” – to unravel the truth. Meanwhile, a disquieting feeling takes hold of Stew; he fears he is somehow tainted, absorbed by the very darkness he’s investigating, as if infected by "The Grinder" itself.