The year between turning eleven and turning twelve bring many changes for Winnie and her friends.

Fifth-grade best friends Katie-Rose, Milla, Yasaman, and Violet are determined to save a new student from Modessa's evil influence, but Katie-Rose is busy not flirting with Preston and all four are distracted by trying to organize Yasamin's sister's birthday party.

Through "instant messages, " chronicles the struggles best friends Maddie, Angela, and Zoe face during their freshman year in college, each of them in a different state, two wondering if their romantic relationships will last, and one determining that roller derby is the key to keeping the trio close.