COHERENCE (2013) Explained

Overview

Coherence follows a group of friends—chiefly seen through Emily’s eyes—as they gather for a dinner party during the passing of the Miller comet. What begins as a night of social expectation turns into a reality-bending survival mystery.

The film leans on improvised performances and a tightly controlled sci-fi premise: as comet-related “decoherence” fractures possibilities, the friends encounter doppelgängers, inconsistent timelines, and different versions of the same events playing out beside (and against) one another.

Main Plot: What Happens

• Emily arrives at the house hoping to enjoy the evening, but her phone shatters almost immediately. The group soon faces:
  • Power outages
  • Weird weather/energy
  • People outside the dinner space who seem “off”
• Early on, they find recurring evidence that the same moments are happening differently across multiple realities—such as:
  • Identical-but-not-identical knocks at the door
  • Different versions of the same people arriving
  • Missing clues that weren’t missing just moments ago
• A major clue appears when the group reaches another house and finds a lockbox/box mechanism containing numbered photos of everyone. The setup suggests each reality is tracking the group’s choices.
  • When different versions of the group open different boxes (e.g., blue vs. red glowsticks), they trigger different outcomes.
• The friends learn—through theoretical science explanations—that the comet temporarily breaks the barrier between parallel outcomes (like the cat in a box thought experiment).
  • When the comet passes, realities collapse back into separation.
• As copies of characters keep swapping in and out, the group realizes they aren’t only observing other versions; they’re accidentally changing things, and those changes ripple across branches.

Highlights and Escalating Mysteries

• “Improvised indie realism” vibe
  • The movie sells confusion through mundane, human behavior: awkward conversation, gossip, and people trying to “just make the call” even as connectivity vanishes.
• Comet history flashbacks
  • Emily recalls prior comet events—moments in other times/places where people got lost or forgot who they were—making the weirdness feel plausibly rooted.
• The door/energy detail that matters later
  • Beth’s fixation on a seemingly “useless” door turns out prophetic, because the door area repeatedly ties into what the realities can and can’t do.
• The multiple-versions twist
  • Characters return after “being gone,” but they’re not the same version—revealed through small differences (bruises, bandages, cracked phones, glowstick colors).
• The book + barrier explanation
  • The group finds a comet/quantum explanation clarifying why the dark area behaves like a roulette wheel between realities—and why some versions never return.

Jokes and Social Drama (Keeping It Human)

• Relationship friction fuels much of the tension:
  • Amir brings his date (referred to as “vixen”), who turns out to be an ex; the “sexy reputation” plays like petty dinner-party banter at first.
  • A running undercurrent of Kevin’s work trip and Emily’s hesitation adds interpersonal pressure.
• As realities diverge, the film uses misunderstandings as a weapon:
  • People lie to each other or assume they’re “safe,” then get exposed by facts that belong to other versions.
• The tone often undercuts dread with comedy:
  • Characters debate whether to use Skype.
  • The chaos is treated like awkward party logistics—until it clearly isn’t.

The Biggest Payoff and Ending

• Emily finds a “best reality” moment: electricity stays on, the comet doesn’t trigger the same collapse cascade for her group, and she chooses it as her anchor.
• However, she can’t fully escape consequences:
  • She encounters her doppelgänger Emily in the same general “nearby” space, and the versions’ actions collide.
• Emily ultimately incapacitates her other self and drags her into the bathtub.
  • But the fallout keeps multiplying—because realities don’t reset cleanly once identities and timelines have been swapped.
• The ending implication is grim and clever:
  • Emily (and others) may become partially “stuck” with the instability she tried to control, suggesting the search for a correct reality doesn’t end with a clean resolution.

Main Themes: What It Means

• The comet turns free will into a literal branching system:
  • Choice matters, but not the way you expect—because consequences from other branches can still reach you.

• The core takeaway becomes a refrain-level idea:

  If you mess with the boundaries between outcomes, you may survive—but you won’t return unchanged.

• The structure reinforces this:

  • Each time characters think they understand the rules, new versions reveal the rules were never stable in the first place.

Notable Personalities (Characters)

• Emily (lead viewpoint)
• Kevin (Emily’s boyfriend)
• Beth (drinks/tincture-having friend; offers “calming” remedies with a darker twist later)
• Amir
• Laurie
• Mike
• Hugh
• Lorie (spelled “Lorie” in subtitles; Amir’s date/ex connection is central)