Ahead of their official launch, Osmosis has just entered the beta test phase, gathering a small group of subjects to ingest the implants into their bodies and find and spend time with the people their tech says are their true soulmates. There's also a rival dating software company called Perfect Match taking a more Tinder-like approach, using an algorithm to narrow down a person's choices to a few individuals, still allowing them the freedom of choice. The Perfect Match people see Osmosis as a kind of prison, saddling you with one person for the rest of your time on Earth.
Like any technology in its early phases, Osmosis has its problems. What if you upend your entire life only to find out that your implant is in the tiniest margin of error, pairing you with someone who isn't actually The One? What if it pairs you with someone who's actively toxic towards you? What if one of you wants their implant taken out or turned off, so that they can find out if they still love you without the technology messing with their head?
And that's not even getting into everything else going on in the show. On the eve of the beta test Paul's wife Joséphine (Philypa Phoenix), who underwent an early version of the technology with Paul, has mysteriously disappeared, her implant offline as if she's been kidnapped. Esther, obsessed with bringing her comatose mother to the surface again, replays memories into her brain shunt in an attempt to galvanize her dormant neurons. That subplot, with its troubling manipulations of memory, lends itself handily to the show's biggest twist involving one of the show's major characters, which, though it's killing me, I won't spoil here.