A strange piece of paper with a mysterious tune is the perfect puzzle for a master detective. Nate the Great has just received a very unusual musical note that holds a secret message. The note is supposed to tell his friend Pip what to do at four o clock, but there is a catch. Their quirky friend Rosamond has turned the instructions into a complicated riddle. Now, Nate and his reliable dog, Sludge, are racing against the clock to figure out what the music means before time runs out. They search Rosamond's garage for hidden evidence, but the answers are not easy to find. With the afternoon ticking away, Nate must use all his logical thinking to decode the musical puzzle and help Pip follow his mother's directions. This engaging mystery challenges readers to look closely at the facts and think creatively to solve a truly melodic brainteaser.