Yesterday, Cedric brought in word that a wonderful person named Dr Roller, the pest controller, was in Pine Ridge. Lum felt that this was his big opportunity to get rid of Clyde, the mouse who has been such a nuisance around the store - and so, without Abner's knowledge, Lum asked Cedric to engage Dr Roller to exterminate the mouse. Abner suspects that something is going on, but doesn't realize that his little friend Clyde, is in danger...