Speed Buggy and his friends are wrongly accused of stealing an advanced battery called the supercell they have to hide. They know it's the work of imposters. They find Dr. Ohm with the fake Speed Buggy. They travel to Dr. Ohm's secret hiding place located at a lost mountain. He invented ""The Soundmaster"" a device to destroy things with it's sound. Dr. Ohm decides to use his invention on Mt. Rushmore, while Speed Buggy and his friends are in jail. Will they get out of jail in time to stop Dr. Ohm?