Shana wakes up one morning to discover her little sister in the grip of a strange malady. She appears to be sleepwalking. She cannot talk and cannot be woken up. And she is heading with inexorable determination to a destination that only she knows. But Shana and her sister are not alone. Soon, they are joined by a flock of sleepwalkers from across America, on the same mysterious journey. And like Shana, there are other "shepherds" who follow the flock to protect their friends and family on the long dark road ahead.

It’s autumn in the town of Harrow, but something besides the season is changing there. Because in that town there is an orchard, and in that orchard, seven most unusual trees. And from those trees grows a new sort of apple: strange, beautiful, with skin so red it’s nearly black. Take a bite of one of these apples, and you will desire only to devour another. And another. You will become stronger. More vital. More yourself, you will believe. But then your appetite for the apples and their peculiar gifts will keep growing—and become darker.

Episode Thirteen takes them to every ghost hunter's holy grail: the Paranormal Research Foundation. This brooding, derelict mansion holds secrets and clues about bizarre experiments that took place there in the 1970s. It's also famously haunted, and the team hopes their scientific techniques and high tech gear will prove it. But as the house begins to reveal itself to them, proof of an afterlife might not be everything Matt dreamed of.

Rory Morris isn’t thrilled to be moving back to her hometown, even if it is temporary. There are bad memories there. But her twin sister, Scarlett, is pregnant, estranged from the baby’s father, and needs support, so Rory returns to the place she thought she’d put in her rearview. After a night out at a bar where she runs into Ian, an old almost-flame, she hits a large animal with her car. And when she gets out to investigate, she’s attacked.

The Ruins follows two American couples enjoying a pleasant, lazy beach holiday together in Mexico. On an impulse, they go off with newfound friends in search of one of their group, the young German who, in pursuit of a girl, has headed for the remote Mayan ruins, site of a fabled archeological dig.

By day, Maeve Fly works at the happiest place in the world as every child’s favorite ice princess. By the neon night glow of the Sunset Strip, Maeve haunts the dive bars with a drink in one hand and a book in the other, imitating her misanthropic literary heroes. But when Gideon Green—her best friend’s brother—moves to town, he awakens something dangerous within her, and the world she knows suddenly shifts beneath her feet. Untethered, Maeve ditches her discontented act and tries on a new persona.

Bryan and Ellie Stockton hope they left behind their demons when they move to their idyllic new home in southern West Virginia. Above all, they want a fresh start for their young son, Derrick, who witnessed the tumultuous first years of their marriage—years that were rife with substance abuse, rage, and resentment. Their bright hope for the future is darkened when a child disappears from their neighborhood. The couple becomes suspicious of a reclusive resident with a degenerative brain disorder.

In a boarded-up house on a dead-end street at the edge of the wild Washington woods lives a family of three. A teenage girl who isn’t allowed outside, not after last time. A man who drinks alone in front of his TV, trying to ignore the gaps in his memory. And a house cat who loves napping and reading the Bible. An unspeakable secret binds them together, but when a new neighbor moves in next door, what is buried out among the birch trees may come back to haunt them all.

Lifestyle journalist Katrine escaped past traumas by moving to a coast renowned for seaside holidays and natural beauty. But when a vast hoard of human remains and prehistoric artifacts is discovered in nearby Brickburgh, a hideous shadow engulfs her life. Helene, a disillusioned lone parent, lost her brother, Lincoln, six years ago. Disturbing subterranean noises he recorded prior to vanishing, draw her to Brickburgh's caves. A site where early humans butchered each other across 60,000 years. Upon the walls, images of their nameless gods remain.

All Rob wanted was a normal life. She almost got it, too: a husband, two kids, a nice house in the suburbs. But Rob fears for her oldest daughter, Callie, who collects tiny bones and whispers to imaginary friends. Rob sees a darkness in Callie, one that reminds her too much of the family she left behind. She decides to take Callie back to her childhood home, to Sundial, deep in the Mojave Desert. And there she will have to make a terrible choice.