A twelve year-old girl worries that her imaginary companion, a brash, aggressive reflection of herself (a warrior, so to speak) needs to go. She’s a bad influence, always causing trouble while she catches the blame. As you can see, reading this, it’s hard to tell them apart.
When she succeeds in removing her from her life through a meticulously stacked bet, she discovers that without that half of herself, she’s ill-equipped to deal with the problems she once endured: tension between her parents, her crush’s interest in another girl, and her teacher’s wayward expectations.
It takes a surreal imagination and a little sacrifice to bring her back into the world, a world then reconciled between war and worry.