It's been 733 days since Jessie's mom died, 45 days since her dad married someone else, 30 days since they had to move to Los Angeles, and only 7 days since Jessie moved to a new private school. And just then a letter from a mysterious stranger arrives in her mail. He wants to become her virtual mentor and help her get used to school, and also... he is really interested in her thoughts and experiences. Can she completely trust her new friend? Or is this just someone's evil joke? Very soon, unnoticed by Jessie herself, their friendship grows into something more. It would seem that the time has come to find out who really is hiding under the mysterious nickname Someone Nobody. Although, perhaps, some secrets are better left undisclosed...