After their mother’s sudden disappearance, a brother and sister meet their estranged aunt; although the sister takes to the aunt instantly, the brother senses something darker inside her and fears for his sister’s safety.

Will Williams, a young Black man, recounts the moment the trajectory of his life changed —when he met his doppelgänger, who became bent on sabotaging Will's life.

After her identical twin goes missing in a small, suburban town, a sixteen-year-old girl reflects on her parents' crumbling marriage and muddles through life without her other half.

When a middle-aged man’s personality literally splits in two, he gives his responsibilities to his new half. But when he is ready to return to his life, the other half refuses.

When a man marries a princess from Cimmeria, a country he believes he imagined into existence, he must come to terms with a culture that recognizes twins as a single person—a primary and their shadow—and the lengths a shadow twin would go to in order to become their own person.

Amidst an outbreak of child abductions across the country, two new parents with toddler twins grapple with growing paranoia and keeping their young boys safe, which begins to put a strain on their evolving marriage.

Later in life, a man recalls a man in a pinstripe suit from his synagogue whom he, as a boy, seemed to have seen everywhere.

A family house in New Jersey watches on as twin boys are born, grow up together, and eventually become two very different men.

Can a husband tell that the creature in his bed is actually an alien Mushroom Queen and that his real wife is now a fungus-like entity spreading her mycelium across the states trying to get home? Probably not, but the family dog can. One minute she's dreaming about escaping from her loveless marriage, and the next, she's thrown underground by her mushroom doppelgänger, who is now sleeping with her husband. Can a husband detect that his wife has been replaced by the queen of mushrooms? Probably not, but her clever dog can.

In a small town, Rhea and Rhoda, two vivacious, inseparable twins, are found brutally murdered and raped by a developmentally disabled man.