A Field in England 2013

Overview

Topic: Film "A Field in England" (2013).
Role: Meticulous television and film archivist.
Constraint 1: Write ONLY verifiable facts from provided SYNOPSIS and SOURCES.
Constraint 2: No inventing/guessing titles, names, dates, etc.
Constraint 3: Original, neutral, encyclopedic prose in plain text.
Constraint 4: No markdown, no asterisks, no headings, no bullet points.
Constraint 5: Length 150-190 words.
Constraint 6: First sentence must not contain spoilers.
Constraint 7: Use ONLY provided facts.
Title: A Field in England.
Year: 2013 (from title/sources), 2014 (from Wikipedia/TMDB US release).
Genre: Horror, Thriller, Fantasy (TMDB); British historical psychological horror (Wikipedia).
Director: Ben Wheatley (Wikipedia).
Writer: Amy Jump (Wikipedia).
Additional Crew: Ben Wheatley and Amy Jump co-edited the film (Wikipedia).
Setting: 17th-Century England during the Civil War.
Plot: A small group of deserters flee a raging battle through an overgrown field. They are captured by an alchemist. The alchemist forces them to help find hidden treasure he believes is buried in the field. They cross a vast mushroom circle for their first meal. The group descends into arguments, fighting, and paranoia. The treasure might be something other than gold. They become victims of terrifying energies trapped inside the field.