In a world of weaponless peace, sixteen-year-old Evie Rattelsford is finally old enough to have her own battle Avatar. Oldest of nine, Evie wants nothing more than to make a name for herself while helping her poor family to survive. Her Avatar turns out to be like everything else she's ever owned. Used and broken, or so the government thought. Shiver isn't a normal Avatar. Unlike the beast creatures the other bracelets release, Shiver has a human form and when President MacMahon discovers the icy human creature, she wants Shiver back. Evie, along with her best friends Tawny Sanders and Takeshi Sato, her trainer Jefferson Hayze and a member of the government, Kennedi Weise, Evie will enter the Summoner Battles to fight to keep Shiver, and her life while discovering the peaceful government may have a secret.