Baker Georgia Tepper has been hired to provide delicious and spooky cupcakes for the Reading Buddies Halloween Party at the library, and she and Kathleen are meeting to finalize the menu of festive confections. Unfortunately, once Georgia's former mother-in-law ambushes her at the library and threatens Georgia with legal action, the afternoon of fun is soured.
When Georgia's litigious in-law is later found dead and the friendly baker is implicated, Kathleen is eager to help prove her innocence. Luckily, Kathleen and her intrepid magical cats, Hercules and Owen, have solved their fair share of mysteries. As a result, she knows that in life as well as crime solving, it is all relative, but with hard work, she can make sure the right criminal is booked.
Halloween is just around the corner and Kathleen (along with the rest of her staff) is planning the Reading Buddies party. Everything seems to be going well (especially the cupcake tasting!) when the baker, Georgia, goes white, apparently her in-laws have tracked her down and are planning on taking her daughter away (they have already tried to kidnap Emmy once - which is when Georgia packed up, changed her name and RAN). This time she stands up to them, but later that night her MIL is found by Kathleen and Marcus and she is well and truly dead.
Georgia is arrested for murder, but Kathleen (and her two Magical Cats Owen and Hercules) are sure she is innocent, and so the three of them start digging to find the truth.