S15·E5 Proverbs 17:3

Episode recap

Task: Write a 280-380 word episode recap for Supernatural S15E5 (Proverbs 17:3).
Constraints:
Use ONLY verifiable facts from the provided SYNOPSIS and SOURCES.
Do not invent/guess titles, names, dates, episode counts, awards, ratings, box-office, viewership, or plot points.
If a detail is not in the material, omit it.
Write original, neutral, encyclopedic prose in plain text.
No markdown, no asterisks, no headings, no bullet points.
Word count target: 280-380 words.
SYNOPSIS: "Sam and Dean’s routine case turns out to be anything but."
SOURCES:
[1] Supernatural (2005), TV-14, Drama, Mystery, Sci-Fi & Fantasy.
[2] Created by Eric Kripke. Broadcast on The WB and later The CW for 15 seasons (Sept 13, 2005, to Nov 19, 2020). Follows Sam (Jared Padalecki) and Dean Winchester (Jensen Ackles) hunting demons.
[3] Created by Eric Kripke. Cast: Jared Padalecki, Jensen Ackles, Jim Beaver, Misha Collins. Brothers follow father's footsteps as hunters fighting monsters, demons, and gods.
[4] Sam and Dean Winchester lost their mother to a mysterious and demonic supernatural force. Father raised them as soldiers to kill paranormal evil.
[5] American horror, drama, fantasy, fiction series. Created by Eric Kripke.
The synopsis for S15E5 is extremely brief: "Sam and Dean’s routine case turns out to be anything but."
The sources provide general series information:
Series title: Supernatural.
Creators: Eric Kripke.
Main characters: Sam Winchester (Jared Padalecki) and Dean Winchester (Jensen Ackles).
Premise: Brothers hunting supernatural beings (demons, monsters, gods) following their father's footsteps.
Background: Lost mother to a demonic force; father trained them to kill paranormal evil.
Network/Run: The WB/The CW, 15 seasons, 2005-2020.
Problem: The user wants a 280-380 word recap for a specific episode. However, the provided synopsis for that episode contains only one sentence: "Sam and Dean’s routine case turns out to be anything but."
The instructions explicitly state: "If the synopsis is sparse, stay concise rather than guessing." and "Never invent or guess