It's summer before eighth grade, and Erica "Chia" Montenegro is feeling so many things that she needs a mood ring to keep track of her emotions. She's happy when she hangs out with her best friends, the Robins. She's jealous that her genius little sister skipped two grades. And she's passionate about the crushes on her Boyfriend Wish list. And when Erica's mom is diagnosed with breast cancer, she feels worried and doesn't know what she can do to help...