Tally is eleven years old and she's just like her friends. Well, sometimes she is. If she tries really hard to be. Because there's something that makes Tally not the same as her friends. Something she can't cover up, no matter how hard she tries: Tally is autistic.   

Tally's autism means there are things that bother her even though she wishes they didn't. It means that some people misunderstand, her and feel frustrated by her.  People think that because Tally's autistic, she doesn't realise what they're thinking, but Tally sees and hears - and notices - all of it. And, honestly? That's not the easiest thing to live with.