First of all, the title has nothing to do with the story or the plot. There is no antimatter, not even mentioned anywhere. The worst part? Not having antimatter in this film just makes it better (or less horrible).
The story goes like this: a chemist runs tests on battery stability to electromagnetic interference and accidentally discovers a whatever-that-doesn't-matter-plus-pi (unfortunately, yes, literally, she adds pi to the "algorithm", although her friend warns her that she "can't use pi this way", ouch!) that creates a mini super-portable garage-made wormhole... Who needs to align collapsing stars to create a wormhole, right?! Just a few volts of electricity and petaflops of computing power can do the trick, for sure...
If your brain survives that initial nonsense, then you are for a roller-coaster... Of boredom! It plays like this: main character enters the wormhole as a test subject, to make a video to get funding for the project. The experiment goes wrong, leaving a photonic trail/copy/doppelganger of main character behind, which has long term memories, but for whatever reason cannot keep new memories (but also doesn't age, tire, eat, sleep etc., although it can bleed, also, for whatever reason). The photonic leftover thinks it is the real thing and runs loose, trying to find out why her friends are acting weird, not knowing/remembering that it is just a "thing" made of photons, not a "real person".
Cutting all the drama down (and is is about 99% of the film, the rest is that agonising crap-fiction), the photonic copy finds her original in the laboratory, where it hears the whole story of what it is (again, because the characters tell it they've been doing it over and over again, but she always ends up forgetting and redoing everything). It is convinced to let itself be destroyed by the wormhole machine, because it is the right thing to do and that will end all the suffering (and because the main character also incorporates her doppelganger's memories, somehow, or so she says, maybe just to help to convince the photocopy to kill itself).
The photoganger jumps into the machine and simply disappears. Everybody happy, they leave the lab and... Camera zooms in on a cocoon (a caterpillar from an earlier experiment with the wormhole) and... Credits roll...
Does anyone remember a cheesy series named "Automan"? I enjoyed that series, for three reasons: it was (baffling) cheesy (even for the 1980's standards!), Cursor (Automan's sidekick, a blatant copy of Bit from "Tron") was amazingly entertaining (mainly considering it couldn't even talk) and it had zero Science on the fiction!
That's exactly the opposite with this film, it tries to bring Science to the dumbest of fiction. The explanations are stupid even without taking into account the distorted Quantum Physics mumbo-jumbo. In the end, the effect is exactly the same as in Automan: a character made of light that can interact with the real world without needing powerful hologram lasers constantly pumping photons to keep it "alive".
Why the photonic doppelganger has long term memories but is unable to keep short term ones? If it cannot keep short term memories, how is it even able to "live" (e.g., suppose it is walking, then a second later it should forget that it was walking and would simply stumble and fall, not even remembering that it was even standing a second before, much less walking, and so on for everything else). The character remembers and forgets things on the convenience of the plot, which literally goes nowhere (it starts in the lab and ends in the lab with nothing changing or even interesting happening in-between).
That's just one of so many things that make no sense in this film. Why does the photocopy bleed, as it doesn't eat, i.e., its body has no metabolism (and if it does, why couldn't it find blood cells in the microscope when it tested itself)?
I resisted the temptation to check the clock every minute, because that made time pass much slower. 1h45min of useless chases, pseudo-scientific crap and boredom, so much boredom! Why didn't the photonic copy die when people started turning on their toasters in the morning, like Automan thankfully did?
The best part of this film is the title, it's very exploitable for jokes... Unfunny ones, for that Matter...
