Dead Diary tells the story of Mathilde, a young girl who has to deal with the usual difficulties of growing up: such as problems at school, not being noticed by that special boy, and having to constantly help ghosts find their peace:

I’m tired. Dead tired. So tired I can barely stay awake to write this. After helping Mr Bircher search for his head all night, I’m a little annoyed too. Dad doesn’t help. He doesn’t know what it's like for a girl my age, trying to fit in at school as much as possible, and trying to fit in all the dead people. It’s not easy being a soul helper.

And so her diary entries begin. Through the school term, Mathilde will learn important life lessons she will never forget. Realising that ghosts and people are not as different as she thought . . .