Don Taro, the son of a pilot, was traveling by train with other passengers and parents when he unexpectedly became a part of the Army of Ulamécia's mission. The mission involved capturing and killing those on board in search of a spy organization known as the "human bacterial team." Despite the chaos, Don Taro and his mother managed to escape. However, their journey was far from over as they soon encountered a member of the team who exposed the shocking conspiracy in Ulamecia.
According to the member, Colonel Golbo was plotting to seize power by assassinating the prince. The human bacterial team was determined to prevent this from happening, and Don Taro was determined to help them. Having been armed with this critical knowledge, he joined forces with the team and pledged to do whatever it takes to stop the conspiracy for the greater good.
