When three year old identical twins Kelly and Kathy, who share telepathy, are kidnapped and only one returns, their mom is the only person who believes her that their other daughter is still alive. Kelly and Kathy Frawley are beloved children who live an average middle-class life, except for the fact that they share an unusual knowledge of the other's thoughts and feelings. Their parents, Margaret and Steve, recently moved to a new area and purchased a older home with enormous restorative potential.
When the twins are kidnapped by two men and Mona, a mentally disturbed woman, for a large ransom, there are no available funds for their return until Steve's employer offers the money. At the same time, Mona, who cannot have children, develops a special attachment to one of the twins and wants to keep her as her own. In addition, one twin quickly becomes sick and when the ransom is paid, evidence of the death of one kidnapper and Kathy is provided. The kidnapping and ransom was instigated by a cunning man known as "The Pied Piper" whose malice grows throughout the story.
However, Kelly continues to talk about how afraid and sick Kathy is, which originally is thought to be her inability to understand death. Eventually, Margaret Frawley begins to hope that both of their daughters are still alive, despite evidence to the contrary. Kelly even has symptoms of being sick, including a severe cough that Kathy had during the kidnapping, despite no evidence of her actually being sick.
Mona, whose real name is Angie, has taken Kathy, drugged her and dressed her as a boy to avoid detection. Her mental issues become increasingly apparent and while staying in a cheap motel, she attracts the attention of a local police officer. She also unknowingly provides Kathy with an antibiotic she is severely allergic to, in an attempt to cure her cough. As Kathy's physical and Mona's mental health worsen, there is the very real possibility that the false note about Kathy's death will actually become true.
Finally, the FBI investigates the misleading information and the lack of physical evidence for Kathy's death and a manhunt begins. Mona's husband, kills her after finding her in Cape Cod and tried to kill Kathy, in order to destroy evidence of the crime. She is found and returned, but is a very sick little girl whose identical twin is still symptomatic of her illness, even though Kelly is not actually sick.
“The Pied Piper” is shown to be the paternal half-uncle of the twins, who has been a life-long criminal, and devised the entire situation to save himself. He is arrested, the family is reunited and despite a few terrifying days, the twins recover.
Best part of story, including ending:
I loved the psychic bond shared between the twins. Even when Kathy is rarely awake, due to being very sick and drugged, Kelly still is aware of what is going on. In addition, the title of the book is made apparent, as the color blue is referenced repeatedly in their clothing and even their room in the home their parents bought at the beginning of the book.
Best scene in story:
Mona/Angie is obviously a character who is very difficult to like and in fact, is easy to hate. However, she has almost child-like communications with her husband and when her experiences in a psychiatric facility are divulged, it created an unusual back story for her. You may still hate her, but at least her motivations are more clear.
Opinion about the main character:
I loved the twin talk, which was their own language that some twins develop as young children and that the twins had always been exceptionally close. Even at three years of age, they were almost incapable of being without one another.