"The Flowers of San Pedro" - PART 3 of 3. As the clues become harder to find Ace Mifflin finds that the crime ridden streets of his Boston neighborhood were nothing compared to what he experiences out West. Mifflin finds himself out of his element as he travels into the midst of cutthroats, Indian shamans, and occult evil. Now he has to deal with a town of very angry villagers and a secret tunnel covered with the mysterious flowers of San Pedro. But when the lead starts to fly, how does his group stand a chance? And what connection could the flowers that Professor Russell was studying, the famed flowers of San Pedro, tie into the Professor's disappearance?