Spa owner Aya accidentally bumps into a distraught Taryn, who turns out to be a sorority sister. When Aya learns that Taryn has been dumped by the very guy she just moved to LA to be with, Aya welcomes her into her home and life as any sister would. But Taryn is not really her sister. She is a former foster child who will do anything, even kill, to create the family bond she has desperately wanted her entire life.

After the death of her estranged sister Nikki, with whom she'd hadn't seen since they were separated in foster care, Carly is surprised to learn that she is named in Nikki's will as guardian of her adopted daughter Mallie. Upon moving across the country to honor her sister's wishes, Carly quickly realizes that not only was Mallie left a substantial inheritance, but that not everyone is happy about the existence of a long lost sister. Someone else wants custody of rich Mallie, and they aren't going to let Carly stand in their way for much longer.