Ken Hayabusa is a racing driver, son of Engineer Hayabusa, designer of the Hayabusa Special racing car and its interchangeable engines. Ken runs for the Sayongi stable aboard the car built by his father and participates in mixed races between rally and endurance. His fiercest rivals are the members of the Black Shadow stable ("black shadow") and above all his owner and "patron", the mysterious Ayab Mobil Dick.