Who do you call when you need to track down a criminal by his own peculiar odor? Ty and Abby Archer- Field Grossologists- of course. This crime-solving brother and sister team report to the secret government Department of Grossology. Hand-picked by a mysterious Director and assisted by the infamous Lab Rat, these tweens investigate crimes too... icky... for local law enforcement to handle. These Field Grossologists face criminals like Sloppy Joe, the world's filthiest thief, and Lance Boil, a former Grossologist turned evil megalomaniac. In this series, based on the books by Sylvia Branzei, everything that Ty and Abby deal with is grounded in real science.