After Daisy's mother dies, she has a hard time dealing with her grief, and as a teen, she starts to hear her mother's voice. She discovers that her father, a math/science genius, has made a robotic replica head of her mother, and put her voice in it. Daisy secretly begins to spend time with the head, and it seems to make her much happier, but then it disappears from his office and she gets into trouble trying to hide it. In the end, it all comes out, including the fact that she has been telling everyone that her mother died of cancer, when she killed herself with pills in the bathtub, and Daisy found her there. She and her father resolve to take the robotic head apart, and face facts, and it looks like they are headed in the right direction to begin healing from their grief at the end of the book.