Synchronic Ending Explained

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By Oscar Flicker
June 13, 2025

tl;dr: The ending of Synchronic sees Steve (Anthony Mackie) sacrificing himself to save Brianna (Ally Ioannides), the daughter of his best friend Dennis (Jamie Dornan), by traveling back in time to ensure she never takes the designer drug "Synchronic." He alters the timeline, preventing her death but erasing his own existence in the present. The film concludes with Dennis discovering Steve's selfless act through a letter, leaving the audience to ponder the emotional and philosophical ramifications of Steve's choice.

Detailed Explanation of the Ending

The climax of Synchronic revolves around Steve's desperate attempt to rescue Brianna, who has been lost in time after taking the experimental drug Synchronic. The drug allows users to travel briefly to random moments in history, but Brianna becomes trapped in the past during a dangerous moment. Steve, who has been diagnosed with a terminal brain tumor, decides to use his remaining supply of Synchronic to find her. He discovers that the drug's effects are tied to the pineal gland, which deteriorates with age-explaining why younger users like Brianna can time-travel more effectively. Since Steve's tumor is affecting his pineal gland, he can control his destination, unlike others who jump randomly.

Steve eventually locates Brianna in the past, realizing she's stuck in a war-torn era where she's about to be killed. In a final act of heroism, he ensures her safety by altering events so that she never takes the drug in the first place. This creates a paradox: by saving her, Steve ensures that his present timeline no longer includes Brianna's disappearance, meaning he never had to go back in time. Consequently, Steve ceases to exist in the present, effectively erasing his own life to save hers. The film ends with Dennis reading a heartfelt letter from Steve, revealing the truth about his sacrifice and the nature of Synchronic.

Unresolved Questions

  1. What happens to Steve after he changes the timeline?

    • He may have died in the past, or his existence was rewritten entirely.
    • Alternatively, he could be stuck in a different time period, living out his remaining days.
  2. Does Dennis remember the original timeline?

    • The film suggests he only learns the truth through Steve's letter, implying his memories were altered.
    • It's possible he retains subconscious memories of the original events.
  3. What is the ultimate fate of the Synchronic drug?

    • Since Steve destroys the remaining supply, it may never be rediscovered.
    • However, the pharmaceutical company behind it could still have records, leaving room for future misuse.

Themes and Symbolism

The ending reinforces the film's central themes of mortality, sacrifice, and the unreliability of time. Steve's terminal diagnosis gives him a unique perspective-his impending death allows him to make a choice others wouldn't. His sacrifice mirrors the fleeting nature of life, emphasizing that some moments (or people) can't be saved without cost. The pineal gland's role as a biological timekeeper ties into metaphysical ideas about consciousness and destiny. The film suggests that time isn't linear but a fragile construct that can be rewritten, though never without consequences.

Personal Opinion on the Ending

I found the ending of Synchronic emotionally resonant but also deeply tragic. Steve's sacrifice is poignant because it's not just about saving Brianna-it's about him finding meaning in his own impending death. The film's sci-fi elements serve as a metaphor for how people grapple with loss and the desire to change the past. However, the abruptness of Steve's erasure from the timeline feels somewhat unsatisfying; I would've liked more exploration of how Dennis copes with the revelation. Overall, it's a thought-provoking conclusion that lingers, even if it leaves some narrative threads unresolved.

Final Thoughts

Synchronic delivers a haunting, bittersweet ending that stays true to its existential themes. While the time-travel mechanics aren't exhaustively explained, the emotional core of Steve's sacrifice makes the finale impactful. The unresolved questions add to the film's mystique, inviting viewers to ponder the true cost of altering fate. It's not a conventionally happy ending, but it's a fitting one for a story about the fragility of time and the lengths we go to for those we love.