The story of two teenage girls who discover they were accidentally switched as newborns in the hospital. Bay Kennish grew up in a wealthy family with two parents and a brother, while Daphne Vasquez, who lost her hearing at an early age due to a case of meningitis, grew up with a single mother in a working-class neighborhood. Things come to a dramatic head when both families meet and struggle to learn how to live together for the sake of the girls.

Wealthy, young-at-heart business owner Edward Stratton III is stunned to discover his brief marriage several years ago produced a son, Richard Bluedhorn-Stratton, now 12 and standing in Edward's living room, wanting to live with the father he never knew. Although Edward's first impulse is to send Ricky to boarding school, he soon relents and let his son move in with him and Kate, his love-struck secretary.

A teenager finds out she was abducted as a toddler and returns to her biological family.

Follow the stories of two families living at opposite ends of the freeway. Bess Denyar is a doctor with a posh mother, Margaret, an architect husband, Danny Bright, and twin 13-year-olds at a private school, Oscar and Edwina. When Bess finds out that she is adopted, she is stunned, but even more so when she meets her birth parents, Wayne and Julie Wheeler. She also discovers that she has three siblings: Amber, Kayne and Brianna. The bogan Wheelers head up a drag racing team in the outer suburbs and are thrilled to discover the daughter they thought they had lost.

Sarah Reeves Merrin adjusts to her new job and new life in New York City, while trying to learn more about her biological parents.

16-year-old Lux was given up for adoption at birth but never adopted. When she is put back into the custody of her estranged-since-high-school birth parents, Cate and Baze, the three form an unlikely family.

An assassin with a secret, Mia's life is changed forever by a letter from her ex.