ANCIENT POWER As the only female detective in Tokyo's most elite police unit, Mariko Oshiro has to fight for every ounce of respect, especially from her new boss. But when he gives her the least promising case possible--the attempted theft of an old samurai sword--it proves more dangerous than anyone on the force could have imagined. The owner of the sword, Professor Yasuo Yamada, says it was crafted by the legendary Master Inazuma, a sword smith...