Jake's plan for a carefree holiday at a musical performing arts camp in the Windy City hits a sour note when he stumbles upon a long-hidden message from his late mother, art historian Karen McGreevy. She had traveled to Chicago thirteen years earlier on a dream assignment, never to return home. With his violin and his mother's mysterious letter in hand, Jake, his best friend Julie, and new pals Ben and Natalie are heading west, where they will follow the clues and uncover the truth about a missing masterpiece, the meaning of friendship, and the enduring bond between a mother and her son.