How can God possibly know what it's like to be a teenage girl? Can Livi Starling truly trust him with all of her life? Even the really tricky bits like dating boys and dealing with nasty new girls and whether her mother is in Heaven?

Determined to prove her devotion to Jesus, Livi is committed to converting as many people as possible, starting with her sister Jill who simply must be saved by the summer. If it will help win God's favour, she's even willing to break up with Joey-- although God will need to speak very clearly for THAT to happen.