The series follows Carter, a young girl who has a wonderful life with her single mother Lori, until a police bust at a carnival ride reveals that Lori abducted Carter as a child. Carter returns to her biological family and must navigate through her new life while vowing to reunite with Lori. However, Carter's biological mother, Elizabeth, is determined to find Lori and punish her for kidnapping her child at the age of 3. Meanwhile, Carter's father, David, is secretly writing the sequel to his hit book about Carter disappearing. Also in Carter's family is her goody-two-shoes twin sister Taylor, and her constantly overlooked younger brother Grant, the self-proclaimed "replacement child."