For generations, the powerful warriors hand-picked by the Imperial Seal have wielded its might dating back to ancient times. The fates of these warriors are brought to life in this tale. As civil unrest and warfare wreak havoc on the land, brave champions leave their mark in history by leading their armies to battle. However, their valor is countered by dread and havoc, causing widespread terror among the people due to the constant threat of the sword. Rikuson, a hesitant figure hailing from a family with a historic duty of protecting the Imperial Seal, must now step forward. The seal was stolen by Sonsaku, and Rikuson reluctantly agrees to help the thief based on his mentor's counsel. But when assassins slay Sonsaku and the Imperial Seal disappears, Rikuson must embark on a quest to recover it and discover his own fate.