When Matt Hudson turns fifteen, he receives a birthday card from his mother - but how could this happen? His father told him she died ten years ago. Was that a lie? Matt doesn't know who or what to believe. He sets out to find his mother, and the reasons behind her abandonment soon become clear. Assigned a letter-writing project at school, Matt writes to his idol - Leonardo da Vinci. This simple act helps him work through his feelings of betrayal, and understand how neglected mental illness can tear a family apart.