After Riz and her friends successfully led
the Counterfeit Bust, Riz has discovered her passion for forensic science. One
day at school, she finds the perfect opportunity to break out her new forensics
kit and solve a new mystery.

On their way to class in the morning, Riz
and her friends notice a commotion outside the music room and hear that
something has been stolen! They head off to class, but Riz's observation skills
allow her to notice the principal, deputy, office staff, and their music
teacher speaking with removalists outside the classroom window. Riz tries to
lipread their conversation and deciphers it at break with the help of her
friends and Peiter from Grade 6. Instruments have been stolen from the music
room in the midst of its renovations!

They start their investigation by sneaking
into the music room and finding some fingerprints.

Riz and her friends collect the
fingerprints of all their classmates and compare the patterns, promising their
teacher to give the class a presentation on their findings. They break off into
teams to collect even more fingerprints at break, from other Grades, and even
from their principal! They finally find their match, but before they can bring
the information to anyone else, the deputy principal pulls them in for a stern
chat.

Will they solve another mystery? Another
forensic science inspired story for young readers.