Sofia and Sam are thrilled to meet Kirra, an indigenous Australian musician who has arrived to play a concert at the community center. But one of Kirra’s musical instruments is missing! She lost it in Australia before flying to Compass Court. Sofia and Sam know exactly what to do. They hop on their ruby-red scooter and—Whiz…Zoom…FOOP! They are transported to Australia! Following clue after clue, Sofia and Sam get closer and closer to tracking down Kirra’s lost instrument, but will they find it in time for the concert?