「劇団☆新感線」の人気舞台を映画館で上映する「ゲキ×シネ」シリーズ第11弾で、2012年に大阪と東京で行われた藤原竜也&永作博美主演の舞台「シレンとラギ」を映像化。南北朝時代をベースに、暗殺者の一族に生まれた伝説の女シレンと、若き剣士ラギが織りなす、国家間の争いに巻き込まれた男女の悲恋を描く。かつてシレンが殺したはずの南の王ゴダイが復活したとの報せが届き、北の重臣キョウゴクはシレンに再びゴダイ暗殺の命を下す。動揺するシレンの心中を察したラギは自ら同行を申し出、2人はゴダイ暗殺に向かうが……。Two souls were drawn to each other without any possible escape from their doomed fates. It was in an era when the country was divided in the north and the south. A legendary woman "Shiren"(Hiromi NAGASAKU) who was born to a family of assassins. A young sword fighter "Ragi"(Tatsuya FUJIWARA) who looked up to Shiren with admiration. News was brought to the north that said the King of the South "Godai"(Katsumi TAKAHASHI) has revived who once was assassinated by Shiren. Shiren was once again ordered by "kyougoku"(Arata FURUTA), a high-ranking vassal of the North, to assassinate Godai. Shiren was upset about Godai being still alive whom she believed she had killed. Ragi who sensed Shiren's distress volunteered to accompany her on the mission. Shiren's cold heart started to melt by seeing Ragi's determination to be there for and support her. Finally the moment to attack Godai comes. It was the moment when an astonishing truth was revealed to the two who had shared their love by that time.