Under the cloudy skies of turn-of-the-century Japan, three brothers shine brightly. Orphaned at a young age, the responsibility of providing for the Kumo family fell to the eldest brother, Tenka. A skilled swordfighter and proud guardian of his rambunctious younger siblings, Soramaru and Chutaro, Tenka Kumo walks through life with unfailing optimism and devotion to his family. But heavy clouds are beginning to settle over their secluded shrine-a growing gloom that signals the return of a deadly serpent known as the Orochi. As the Japanese military's Yamainu Squad searches for the serpent's human vessel, the unrest caused by the strict laws of the Meiji era spreads rebellion across the countryside. As the Kumo family's ancient connection to the Orochi comes to light, old rivalries will be reignited, and the brothers' carefree life will give way to the darkness of an ancient prophecy. As long as they stick together, what's the worst that could happen?