After driving down the straightest road Tick had ever seen—with nothing but huge piles of snow and ice on either side—they pulled into the small town of Macadamia right around noon. The first thing they did was stop at a gas station to fill up the car for the drive back so they wouldn’t have to do it later. The cracked and frozen streets were deserted, with only a few cars parked along the main road in front of various dilapidated shops and dirty service centers.

“Well, I figure we have about six hours until we need to head back,” Tick’s dad said as he started the car again. “Or, if we don’t discover anything today, we can always call Aunt Mabel and tell her we got stuck somewhere for the night and that we’ll come back tomorrow. She won’t want us taking any risks.”

“Yeah,” Tick said. “But she’ll be spitting nails if I’m stranded at some nasty hotel without her there to brush my teeth for me.”

His dad laughed. “You’re a good sport, Professor. Now you know why your mom and Lisa were just fine letting the two of us come up here alone.” He put the car into gear and drove away from the gas station. “The lady in the gas station said the post office was just up here on Main Street. That’ll be our first stop.”

~

Five minutes later, Tick followed his dad through the frosted glass door of the post office, loosening his scarf, not sure what to expect. But he did have an odd sensation in his stomach, knowing the original mysterious letter from M.G. had been mailed from this very building. It was almost like seeing the hospital room where you’d been born, or a house your ancestor had built. Despite how he felt, this was where any investigation would have to begin—he just hoped it didn’t end here as well.

The place was boring, nothing but gray walls and gray floors and gray counters—the only thing breaking the monotony was a tiny faded Christmas tree in a corner with six or seven ornaments hanging from the sparse branches. No worker was in sight.

“Hello?” Dad called into the emptiness. A little bell sat on the main counter; he gave it a ring.

A few seconds later, an old man with bushy eyebrows and white stubble on his cheeks and chin appeared from the back, looking none too happy that he actually had to serve a customer. “What can I do for you?” he asked in a gruff voice before his feeble attempt at a smile.