Josh Jamieson, Hannah's rock star idol, is in town. But as Zac and Hannah emerge from his packed concert, they discover that there's been an explosion at the Central Bank next door. And ten million dollars is missing! Eleven-year-old detectives Zac and Hannah lead the reader through the clues and help them piece together all the forensic science methods used, such as DNA fingerprint plotting; explosive residue analysis; following footprints (even toe prints) to calculate the weight, height and gender of a suspect; acoustic analysis of a rock song; using ultraviolet and infrared radiation to read burnt documents; and tracking where your money goes, and where it has been, using the Money Tracker website.