The story of the relationship between the King who is renown for his ruthlessness and his subject who became his trusted steersman. They met when the King decided to disguise himself as commoner to see how his subject was doing. He befriend a commoner after a fight to decide who should win the girl's hand. They become blood brother and the commoner was assigned to be his steersman. When there was an assassination attempt at the King, the steersman tried to evade the threat and cause the boat to run aground with death penalty. It's time to see if the friendship is stronger than the rule of law that the King must have absolute authority over the life of his subject regardless of their personal relationship.
第二次世界大战前夕，一名普通的陆军士兵（龟梨和也 饰）因帮助同伴而殴打长官，随后被军事法庭判处死刑。关键时刻，名叫结城（伊势谷友介 饰）的神秘男子突然出现，并将之吸纳进专门培养间谍的秘密部门——D机关。历经层层考验，青年终于得到第一项任务。不久前某犹太科学家遭到暗杀，而他记载着最新式武器设计图的黑色笔记据说落入美国大使埃内斯特·格雷厄姆（Richard Moss 饰）手中。青年化名嘉藤次郎来到了被称为魔都的城市，伺机盗出笔记。与此同时，英、苏、德等国的特工也闻风而动，顶峰的间谍大战即将展开…… 本片根据柳广司的同名系列小说改编。
唐时大月国王子乌力罕（乌日根 饰）逃到狄道避难，得到狄道兵马使李存山父女的帮助以及卧龙寺高僧索南坚教化，并由此放下仇恨精心修行，不想篡位的叔叔葛格尔并未放过他，还在伺机杀他灭口，被逼无奈的乌力罕逃回大月国着急父亲的旧部复国成功，却又因为爱人李晨轩（夏晴 饰）的离去而迁怒大唐，起兵攻占狄道，险些误将自己的儿子杀死，最后还是在索南坚“以身噬虎”的精神感召下重新认识了自己，将大月国交给大唐，自己回到卧龙寺出家修行。