H+

San Francisco, USA, five minutes before it happened: Fragments of news reports show a future world as it adopts H+, a radical new way to be connected to information and one another through only one's thoughts via a high-tech implant. While the breakthrough is hotly anticipated by the masses, some malcontents do not eagerly adopt it. As a couple parks in an underground airport garage, the husband, Lee, surreptitiously watches a football game on his H+, upsetting his wife, Julie, who wants him to drive safely. Their domestic squabble is interrupted by a bizarre spectacle that throws their world into chaos.

San Francisco, USA, 15 seconds after it happened: Julie and Lee stand shocked at the fallen people surrounding them in the parking garage before Lee risks a similar fate by rushing to their aid. A mysterious bearded man in glasses, Kenneth, appears and leads a small group down to Level 6, where he insists they're safe. But some in the group are skeptical of their hero, particularly his theory for what has just happened.

Helsinki, Finland, seven years before it happened: A young man, Topi, enters a bar to meet a woman named Manta, with whom he has chatted online. Manta plays mysterious, giving Topi a hard time, but Topi may have secrets of his own.

San Francisco, USA, one minute after it happened: With a small group from Level 6 of the parking structure, Kenneth takes Lee's body away from the sprinklers to a van, hoping to save him.

Mumbai, India, five months before it happened: Hard-charging technology executive Breanna and her husband, Connal, both of whom are Irish, meet with a doctor, Gurveer, and a young woman, Leena, who are both Indian, to arrange a surrogate pregnancy. When the introductory meeting turns into something more like an interrogation and Breanna leaves to continue a work call on her H+, Connal tries to make a more human connection.

Oria, Italy, two years after it happened: In a desolate village, Matteo tries to help a man injured in an accident, but Matteo realizes that getting the medicine he needs will not be easy.

Mumbai, India, five months before it happened: Gurveer prepares to implant H+ in Leena so the biological parents can track her pregnancy from abroad. Leena anxiously asks many questions about the process. Gurveer, who reveals that his own body is not compatible with H+, tells her she is lucky ... although something else is commanding his attention.

San Francisco, USA, 45 minutes after it happened: Over the objections of Francesca, a soon-to-be board-certified neurologist who can't believe what she's seeing, Kenneth races to save Lee's life with spare wiring and circuit boards.

Helsinki, Finland, seven years before it happened: Now in a physical relationship with Manta, Topi goes to a crime scene that is technically out of his office's jurisdiction. His boss holds him back, but a look at the victim offers a tantalizing clue.

San Francisco, USA, 50 minutes after it happened: Kenneth tells the small group to plan for a week below ground. When he tries to stop an angry survivor from leaving, Kenneth is accused of being a terrorist. Just as he is craving good news, he's pulled away to examine Lee, whose condition has changed.

Helsinki, Finland, seven years before it happened: Sharing a growing intimacy, Topi and Manta go on a hike, but Manta won't reveal anything about a particular subject.

San Francisco, USA, 20 hours after it happened: In a quiet moment, Francesca asks Kenneth for the truth. How does he know so much about H+? Meanwhile, a group of survivors searches for Kenneth.

Portland, Oregon, USA, five years before it happened: After pitching her new software venture to a corporate board, Breanna privately meets with a younger, clean-shaven Kenneth to offer an opportunity.

San Vito, Italy, two years after it happened: Someone with an interface observes Matteo outside the gates of a base. Later, Matteo returns home and has a flash of insight.

Mumbai, India, three months before it happened: In a conference with Dr. Gurveer, Leena is asked to adjust her sleep schedule to match Breanna's work demands. Strangely, Gurveer's attention seems divided.

San Francisco, USA, two days after it happened: Brian, a young boy, finds his mother in the parking structure and describes the chaotic world above. Kenneth gives him a special assignment.

Helsinki, Finland, seven years before it happened: Drunken Topi stumbles onto a fragment of conversation online and is suddenly messaged by Manta, whom he meets at their bar for a surprising exchange.

Oria, Italy, two years after it happened: After experiencing a vision, Matteo is awoken from his trance by someone he has been close to but never met, standing in the rain.

Mumbai, India, one month before it happened: Through H+, Connal shows Leena more personal parts of his life as their connection grows deeper.

Oria, Italy, two years after it happened: As Matteo gasses up his car for a trip that will take a week, he prepares a young man to lead when he's gone ... and makes other preparations with his passenger.

Northern California, USA, two weeks after it happened: As Francesca and Simona reconnect in a cabin, Kenneth preps Anthony on what to do while he's gone. Kenneth is planning a dangerous journey with a critical goal.