The brass pieces pulsed with strange energy as Václav and Polly hurried through Prague's evening streets. Each piece in the leather bag seemed to connect with the city itself. They grew warmer as the pair approached St. Vitus Cathedral.
"It's like they know where they want to go," Václav said quietly. The cathedral's tall Gothic towers rose above them, catching the last sunset light.
Polly flew overhead, watching for the mysterious woman from the square. "The alignment starts in less than an hour," she called down. "Whatever your grandfather planned, we need to—"
She stopped suddenly. There, carved into an ordinary stone at the cathedral's base, was the same star pattern from the brass disc. It had been hiding there for centuries.
Václav knelt beside it and traced the old grooves with his fingers. "Of course," he whispered. "The cathedral, the clock tower, the old alchemical sites — they're all connected. My grandfather discovered that Prague itself is one huge astronomical instrument."
The carved stone began to glow with golden light, just like the brass pieces. A hidden door clicked open in the wall. Inside was a crystal lens, perfectly kept despite its age.
"The clock doesn't just tell time," Polly realized. "It focuses star energy through specific points in the city. That's why it stopped working!"
Václav carefully took the lens. It fit perfectly with one of the brass pieces.
A shadow fell across them. The woman in black stood at the cathedral entrance. "Mr. Novotný," she said in accented English, "I represent people who are very interested in your grandfather's research."
"The only thing I'll do," Václav replied firmly, "is return these pieces where they belong."
The cathedral bells began to ring. The astronomical alignment was beginning. Strange lights flickered in windows across the city.
"We need to get back to the clock tower," Polly urged. They had thirty minutes to solve a puzzle that had waited seventy-eight years.
