Gabby St. Claire knows how to clean up scum. She can get blood out of carpet, pick shattered bones from plaster, and clean up other less-than-enticing fluids from nearly any surface. She also knows how to clean up another kind of scum-the scum of the earth. Crime scene cleaner and wannabe forensic investigator Gabby St. Claire knows her best friend, Sierra, isn't guilty of killing three people in what appears to be an ecoterrorist attack. But...