
In order to steal cargo from the Time Retrograde Army, Izuminokami Kanesada joins the rookie Horikawa Kunihiro at the end of the shogunate period. The two swords complete the mission through their valiant efforts, but what awaits them is a new directive: "At a certain castle town in 1863, the new Time Retrograde Army will appear." Izuminokami and Horikawa prepare to intercept the enemy with this limited information. However, the two swords are unable to fend off the overwhelming number enemies. In their time of crisis, their master "Saniwa" appears.
In order to steal cargo from the Time Retrograde Army, Izuminokami Kanesada joins the rookie Horikawa Kunihiro at the end of the shogunate period. The two swords complete the mission through their valiant efforts, but what awaits them is a new directive: "At a certain castle town in 1863, the new Time Retrograde Army will appear." Izuminokami and Horikawa prepare to intercept the enemy with this limited information. However, the two swords are unable to fend off the overwhelming number enemies. In their time of crisis, their master "Saniwa" appears.
With the help of Mutsunokami Yoshiyuki, Yagen Toushirou, Tonbokiri, Izuminokami and Saniwa head to the castle in pursuit of the Time Retrograde Army. Leading the charge, Mutsunokami witnesses the slaughter of the castle samurai at the hands of the Retrograde Army. In order to find out the Time Retrograde Army's true purpose behind the castle attack, Izuminokami and company must stay in this era to continue their investigation. Saniwa names Izuminokami Kanesada, Mutsunokami Yoshiyuki, Horikawa Kunihiro, Yagen Toushirou, and Tonbokiri as the Second Unit, and charges Izuminokami with leadership of the unit.