The fith instalment in a unique series about a special group of kids training in the ways of the samurai. Lessons, lessons and more lessons. Miko hates lessons, but when he is chosen by Ki-Yaga's former teacher, Pak Cho, as an apprentice he is taught the value of another skill. The Little Cockroaches and their teacher are travelling to Daeheon City to deliver a message from the secret training camp of the Hwarang warriors. But when the samurai kids are caught in the middle of much unrest in the Nine Valleys, they quickly learn that old ways must embrace new.