Leah's mother underwent in-vitro fertilization from a donor bank to have Leah. Later, she married and had a child with her husband and as much as Leah loves her new family, she can't help but wonder about her real father. Who is he? Did he father other children through in-vitro? So against her mother's wishes, Leah decides to try and track down her donor father and half-siblings. This puts a very timely spin on the classic adoptive sibling story.