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.
SAN FRANCISCO, USA - 15 SECONDS AFTER IT HAPPENED: Julie and Lee stand shocked at the sudden chaos surrounding them in the lot and then risk a similar fate as Lee goes to aid the fallen people. 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 and, namely, his theory for what has just happened.
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
SAN FRANCISCO, USA - 20 HOURS AFTER IT HAPPENED
Porland, Oregon, USA - 5 years before it happened
San Vito, Italy - 2 years after it happened
Mumbai, India - 3 months before it happened
San Francisco, USA - 2 days after it happened
Helsinki, Finland - 7 years before it happened
Oria, Italy - 2 years after it happened
Mumbai, India - 1 month before it happened
Oria, Italy - 2 years after it happened
Dublin, Ireland - 4 years before it happened
Southern Italy - 2 years after it happened
Dublin, Ireland - 3 weeks before it happened
San Francisco, USA - 1 week after it happened
Tierra del Fuego, Chile - 4 years before it happened
Brazzaville, Republic of Congo - 1 year after it happened
Oria, Italy - 3 months before it happened
Northern California, USA - 2 weeks after it happened
Dublin, Ireland - 3 years before it happened
MUMBAI, INDIA - 7 MONTHS AFTER IT HAPPENED