"Time is 1590(Tensho 18 in the Japanese era). After the demise of warlord Nobunaga ODA, Japan was about to be unified by Hideyoshi TOYOTOMI. However, there was one man in Kanto region that was defiant to it. That man, who named himself TenmaOh (Mirai MORIYAMA) and leads the KANTO DOKURO-TO, an armed group hiding in the pitch-black DOKURO-JO (skull castle), once worked for NOBUNAGA. Sutenosuke (Shun OGURI) happens to rescue a woman who has been chased by the KANTO DOKURO-TO, which was headed by the bloodthirsty madman TenmaOh. To hide and shelter the woman, Sutenosuke meets MUKAIYA RANBE (Taichi SAOTOME) at a brothel district. Manipulated by magical fate, people start to congregate in the Kanto region. When the shared past between Sutenosuke and RANBE, and the relation to TenmaOh come to light, it is also the time when the dark ambition of TenmaOh is about to be revealed. Without regrets, Sutenosuke heads for the DOKURO-JO, which is surrounded by 20,000 soldiers, to destroy it and stop TenmaOh’s dark ambition with just seven souls."