When Frank Devlin walks into Justin Wright's office, the renowned New York City clinical psychiatrist makes the decision to take on one of the most challenging cases of his career. Justin is determined to help Frank, a young man with multiple personalities (“alters”), live a happier, more fulfilling life. Little does he know that Frank and his alters are secretly weaving themselves into Justin’s life in ways that will affect the Wright family forever.

Architect Carter Grady is constructing his most prized design - a family. Two years after marrying his deceased best friend’s wife, Tori, he’s ready to officially adopt her two sons, independent Daniel, 12, and the sweet five-year-old Nathan. All he needs to do is sign the legal paperwork. But a phone call changes everything. A one-night stand from over a decade ago died in a freak accident and Carter now learns two things: the random stranger’s name...and that they share a 10-year-old son, Frances.

Emily and Elizabeth spent their childhood locked in a bedroom and terrorized by a mother who drank too much and disappeared for days. The identical twins were rescued by a family determined to be their saviors. But there are some horrors love can’t erase....

Growing up abandoned by her father and raised by a single mother, Celeste was determined to create the perfect family - but even perfect families have secrets. Her days are filled with a rewarding career, a devoted husband, and her four-year-old daughter. Celeste is the only one who knows the precarious house of cards her family is built upon - until the day her daughter falls critically ill. Then her world quickly spirals out of control, her secret threatening to destroy her marriage, family, reputation, and sanity.

While investigating Blackston’s recent activities, FBI Agent Jeremy Winter stumbles upon a string of missing persons within state parks. Unable to convince his boss that Blackston’s disappearance is anything other than a lost hiker, Winter joins forces with a local police officer to continue the search. As the clues mount, a dark figure from Jeremy’s past emerges with an ultimatum - one that could force him out of the bureau. Afraid that his girlfriend, fellow agent Maggie Keeley, will be dragged into a high-stakes political game, he delays his decision.