Water is a force to be reckoned with. It can break metal in an instant, or over time. And it surely can shatter a society crippled by politics and fear. This is the story of Edo-era Japan, of a nation divided by social strata and infighting. A few bold samurai must force many disparate and poor regions to sacrifice their very lives for the future - in order to hold back the nation's raging rivers. In this original tale of blood, guts, brutality and anger, the history of Japan unfolds in true period drama.