To her own credit, Lois's cleaning business is really starting to clean up. So much that she decides to open up a new office in the neighboring town of Tresham, where she takes note of an unusually busy--and slightly sinister--storefront across the street. But business quickly mixes with Lois's nose for sleuthing when she's hired to clean the house of the pompous mayor, and then witnesses his honor's limo picking up a dubious-looking package from the mysterious shop. There's a filthy underside to Tresham, and when bloody murder starts staining the quaint town, Lois has to put her own life on the line to straighten things out.