The Samurai Kids journey to China to fulfil a promise Sensei Ki-Yaga made many years ago.
Long before Sensei Ki-Yaga built the Cockroach Ryu, he travelled to China and studied at the Shaolin Temple in the north-western Song Shan Mountains of China. Sensei promised to return to help the abbot in the Temple's time of need. Telling the Samurai Kids that the abbott has a treasure in need of safekeeping, they set off on a journey to China.