Winter has arrived in Broward's Rock, and business has slowed for Annie Darling, owner of mystery bookstore Death on Demand. So Annie jumps at the chance to host a book signing, even though it conflicts with her shift at the local charity shop, Better Tomorrow. Luckily, fellow volunteer Gretchen Burkholt agrees to sub for her. Unluckily, she's found dead the next day. Now Anna and her husband Max are determined to get to the bottom of who killed Gretchen, and why.