Milly is constantly bullied by Amelia. Everyday Amelia makes fun of her, threatens her and constantly puts her down. Milly can't tell anyone because Amelia is her. Milly also can't remember anything from her past, to when her parents were alive. She wants to know so badly want happened to her parents and what life was like before they died. After her house catches on fire, she and her grandpa move in with her Aunt Rachel who is hot and cold. One minute she is kind to Milly, the next she turns to ice. Milly finds Aunt Rachel's diary and begins to read it.

In Disconnected, orphaned protagonist Milly struggles to unearth what really happened to her parents, Frank and Violet Norris, as well as discover the secrets of her own identity, all while battling Dissociative Identity Disorder (DID). After Grandpa George's house burns down, Milly and her grandfather relocate to her Aunt Rachel's sprawling Victorian estate, complete with secret passageways, a mysterious tombstone, and eerie cries in the attic.

Milly, 17, has had problems with the girl she sees everywhere, Amelia, who seems to be almost a part of her. This has been occuring ever since her parents were killed in a car crash. When her grandpa and she move into her Aunt Rachel's house, the mysterious Milly seems to quickly become more and more dangerous. Meanwhile, she also falls instantly in love with Blake. Near the end, there are some major plot twists and some interesting things uncovered by her family.