Yesterday, Lum was faced with the unhappy news of informing Abner that while he was out of the store, Lum and Dr Roller the pest controller, had set traps for, and surely caught his friend Clyde the mouse. However, Clyde outwitted Dr Roller, and the famous doctor resorted to his most deadly weapon - poison gas. He made one mistake, warning the old fellows not to strike a match, lest the whole plan be ruined, so Abner - thinking he could save the life of his little friend - struck a match...