For hundreds of years the Gedoshu, monsters from the Sanzu river have used cracks to slip into our world causing terror and destruction. Five samurai clans have been fighting them for generations using their powers to draw abilities from kanji. In tne present day the Gedoshu's leader Dokoku is raising the Sanzu river to flood the world. Takeru Shiba, the 18th head of the Shiba clan calls on his retainers to fight as Shinkengers against the Gedoshu.