Robert Dawson suddenly wakes up with a terrible headache. He's only 11 and migranes are already happening millions of times. Although, one day, a week before his birthday, he wakes up from a horrible nightmare and he is hearing a girl voice in his head. He is completely unaware that the voice in his head is actually his dead twin-sister who died when they were born. But he soon finds out that the truth from his mother who is divorced from his father. Camilla Dawson, Robert's twin-sister, wants to escape his brother's mind because she is actually hurt inside. Robert finds out about this witch (which is pretty bizarre to find, considering that they are living in the 21st century) and asks her help to free his twin-sister. They have to recite a spell, but Robert mistakingly mispronounces the words. There is darkness that is coming and Camilla and Robert have to face it.