More than seven years after the world has become a frozen wasteland, the remnants of humanity inhabit a gigantic, perpetually-moving train that circles the globe as class warfare, social injustice and the politics of survival play out.

This equal parts survival epic, psychological horror story and coming-of-age drama tells the saga of a team of wildly talented high school girls soccer players who become the (un)lucky survivors of a plane crash deep in the remote northern wilderness. The series chronicles their descent from a complicated but thriving team to savage clans, while also tracking the lives they’ve attempted to piece back together nearly 25 years later.

Alec Mercer is a world-renowned professor of behavioral psychology with a unique insight into human nature who lends his expertise to an array of high-stakes cases involving governments, corporations and law enforcement. However, he meets his match in a female domestic terror suspect who turns his world upside down.

The story of Melissa Reed, daughter of Keith Jesperson, aka the Happy Face Killer. After decades of no contact, Keith forces his way back into his daughter’s life, and Melissa must find out if an innocent man is going to be put to death for a crime her father committed. In the process, she must face a reckoning of her own identity.

Reeling from her father's suicide, Jemma decides to take the illicit drug known as Necro, said to reconnect the living with the recently deceased.

Just prior to his release from prison, Ted Evans receives a threat from the man whose family he killed in a DUI - 'if you make contact with your family, I'll kill them'. Believing that the danger is real, Ted exiles himself to a reclusive life to protect his family. However, Ted's wife Sara knows the threat is merely a manifestation of her husband's profound guilt. Determined to rebuild their family, Sara tracks Ted down to confront him with hard evidence that the threat is imagined. But she has no idea just how unhinged he has become - or how real the threat may be.