Melody Bird has discovered an old abandoned house in the corner of the graveyard, and a mysterious boy hiding out there...

Hal tells her that he''s a spy-in-training, using the house as a base for his undercover surveillance of a known local criminal.

Her friends Matthew and Jake don''t believe that a teenager would be entrusted with this mission and turn the tables to spy on him, uncovering secrets and unravelling a mystery as they go.