With Grandma Firenzi's belated Christmas gift on her mind, BEANS steps off her school bus and immediately checks her porch mailbox. To her surprise, she finds an envelope addressed to her, but it is torn open. Inside is her Christmas card, but nothing else. The card offers a funny belated holiday greeting, playing off the cover's scene of two slow-moving tortoises on a Florida beach. Then Grams added a special handwritten note, "Enjoy the cold cash. Don't let it burn a hole in your pocket. XOXO Love always, Grams." BEANS double checks the envelope, but the money is nowhere to be seen! A couple of hours later, BOOGER arrives home from his high school track practice. After BEANS informs him about her dilemma, he questions his BABCIA in the kitchen then examines his own family's mail delivery. He discovers that someone clearly tampered with a few of their envelopes. At once, BOOGER contacts his neighbor to share the important news. With grave concerns about a sneak thief in the neighborhood, BEANS decides to find out who is stealing the mail and why.