SAN FRANCISCO, USA - 5 MINUTES BEFORE IT HAPPENED: we segue to a couple parking their car 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 throwing their world into chaos.

HELSINKI, FINLAND - 7 YEARS BEFORE IT HAPPENED: a young man, Topi, enters a bar to meet a woman named Manta, who he has chatted with online. Manta plays mysterious, giving Topi a hard time, but Topi may have secrets of his own.

SAN FRANCISCO, USA - 1 MINUTE AFTER IT HAPPENED: with a small group from Level 6 of the parking structure, Kenneth takes Lee's body to a van to get out of the water from the sprinkler system with the hope he may be able to save him

MUMBAI, INDIA - 5 MONTHS BEFORE IT HAPPENED: Breanna, a hard-charging technology executive, and her husband Connal (both Irish) meet with a doctor, Gurveer, and a young woman, Leena (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+, Connall tries to make a more human connection.

ORIA, ITALY - 2 YEARS AFTER IT HAPPENED: in a desolate village, Matteo tries to help a man injured in an accident, but realizes getting the medicine he needs will not be easy.

MUMBAI, INDIA - 5 MONTHS BEFORE IT HAPPENED: Gurveer prepares to implant H+ in Leena so the parents can track her pregnancy from abroad: she's anxious and asks many questions about the process. Gurveer, who tells her his own body is not compatible with H+, tells her she is lucky...though something else is commanding his attention.

SAN FRANCISCO, USA - 45 MINUTES AFTER IT HAPPENED: Kenneth races to save Lee's life with spare wiring and circuit boards, against the objections of Francesca, a soon to be a board-certified neurologist, who can't believe what she's seeing.

HELSINKI, FINLAND - 7 YEARS BEFORE IT HAPPENED: Topi, now in a physical relationship with Manta, goes to a crime scene which 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, and tries to stop an angry survivor from leaving, only to be accused of being a terrorist. Just as he needs good news, he's pulled away to examine Lee whose condition has changed.

HELSINKI, FINLAND - 7 YEARS BEFORE IT HAPPENED

Topi and Manta hike, sharing a growing intimacy - but Manta won't reveal anything about a particular subject.

SAN FRANCISCO, USA - 20 HOURS AFTER IT HAPPENED

In a quiet moment, Francesca asks to get the truth from Kenneth, how he knows so much about H+. Meanwhile in the airport above a group searches for Kenneth.

Porland, Oregon, USA - 5 years before it happened

Breanna, after pitching her new software venture to a corporate boardroom, later privately meets with a younger, clean-shaven Kenneth to offer an opportunity.

San Vito, Italy - 2 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 - 3 months before it happened

In a conference with Dr. Gruveer, Leena is asked to adjust her sleep schedule to match Breanna's work demands. Strangely, Gurveer's attention seems divided.

San Francisco, USA - 2 days after it happened

Brian, a young boy, finds his mother in the parking structure and describes the chaotic world above, and Kenneth gives him a special assignment.

Helsinki, Finland - 7 years before it happened

Drunk, Topi stumbles onto a fragment of a conversation online and is suddenly messaged by Manta, who he meets at their bar for a surprising exchange.

Oria, Italy - 2 years after it happened

Matteo experiences a vision and is awoken from his trance by someone he has been close to but never met, standing in the rain

Mumbai, India - 1 month before it happened

Through H+, Connal shows Leena more personal parts of his life - their connection grows deeper.

Oria, Italy - 2 years after it happened

As Matteo gases up his car for a trip that will take a week, he prepares a young man to lead when he's gone...while making other preparations with his passenger.

Dublin, Ireland - 4 years before it happened

Just before Kenneth leaves to visit the human trials of H+ in South America, Breanna feels there is something he needs to hear.

Southern Italy - 2 years after it happened

Matteo and his passenger come to a roadblock with armed thugs. She makes a quick plan and gives Matteo explicit instructions.

Dublin, Ireland - 3 weeks before it happened

As we see what Connal sees through his connection, Breanna grows suspicious of all the time he spends on his H+.

San Francisco, USA - 1 week after it happened

Finally out of the parking structure, Kenneth needs to lead his people out of the reception area for H+ but Jason holds him at gunpoint. However Kenneth holds an advantage Jason wasn't counting on.

Tierra del Fuego, Chile - 4 years before it happened

Kenneth visits the South American lab where the H+ technology is being synthesized onto the map of the human mind, and views the first test subject: someone we know well.

Brazzaville, Republic of Congo - 1 year after it happened

Topi flees a young African soldier following him - only to find an unlikely ally.

Oria, Italy - 3 months before it happened

Matteo, in priestly robes, faints as he meets Simona in his church - when he wakes he blames it on his body adapting to his new H+. In the pew, he tries to make a personal connection with Simona, who confesses to visions past and future.

Northern California, USA - 2 weeks after it happened

As Francesca and Simona reconnect in the cabin, Kenneth preps Anthony for what to do while he's gone: he's planning a dangerous journey with a critical goal.

Dublin, Ireland - 3 years before it happened

After skipping his own party, Breanna seeks out Kenneth at his apartment. Kenneth reveals why he's been on edge.

MUMBAI, INDIA - 7 MONTHS AFTER IT HAPPENED

Gurveer tries to convince his superior of an important next step with the child.

LONDON, UK - 9 YEARS BEFORE IT HAPPENED

In an underground medical experiment, a figure presses a nervous Gurveer to bring his new implanted chip to full power on an unlikely test subject.

Dunbara, Republic of Congo - 1 year after it happened

Topi and the young soldier search for Dunbara - a village burned to the ground long ago. They find the area and dig; Topi knows what he is looking for...

Northern California, USA - 3 years before it happened

Jason and his fringe political clan of neo-Luddites have raised the stakes and kidnapped an enemy to their cause...and let him know what they want from him.

Mumbai, India - 8 months after it happened

In the post-disaster India, Gurveer visits Leena's small village with one goal in mind, and encounters a reaction he doesn't expect.

Northern California, USA - 3 years before it happened

Kenneth has a dream and wakes with an insight that drives him to alert someone immediately.

Southern Alberta, Canada - 8 months after it happened

Working with Simona, Kenneth struggles to set up a familiar network.

New York, USA - 8 years before it happened

Jason wants a fair settlement for the harm caused him by LPW, a biotech firm. The LPW lawyer interprets things differently.

Rome, Italy - 2 years after it happened

Topi reaches the base and finds a clue: a message from Manta meant only for him.

Dunbara, Republic of Congo - 7 years before it happened

Peters and Gurveer negotiate with a remote African chief, promising, "When you see what it can do for you and your tribe, you'll realize money is nothing in comparison."

Rome, Italy - 2 years after it happened

Manta, having hallucinations, reaches out to Matteo for help. She says she doesn't need him to be a priest, but wants him to listen to her confession.

Oria, Italy - 3 months before it happened

Concealing his H+ connection from Jason and the neo-Luddites, Kenneth forms a plan a continent away.

Yozgat, Turkey - 1 year after it happened

Riding with Gurveer and baby Vadish in the back seat, Leena connects with Connal for the first time in a year...and reaches an unsettling discovery.

Northern California, USA - 2 weeks before it happened

While rallying his troops, Jason's mechanical body brace gives out and he is unable to move his arms and legs. He turns to someone he considers a trusted friend for help.

Southern Alaska, USA - 1 year after it happened

Kenneth, Simona and Francesca reach the Alaska Data Center, but there is a surprise waiting for them there.

Hamburg, Germany - 3 years before it happened

Topi chases Manta into a German subway station desperate to have her hear his one plea.

The Vatican, Italy - 2 years after it happened

Topi crashes into where Gurveer is hiding with Vadish...he carries a desperately sick Manta. Gurveer knows what is causing Manta such pain.

Western Ireland - 30 minutes before it happened

Breanna's relationship with Connal reaches a breaking point, as secrets past and present are unearthed.

Our world - when it happened

At the data center, Kenneth has something else up his sleeve for Jason. In a flashback to the moment of the massive virus attack, we find clues to the deeper cause.