Václav and Polly walk fast. They go through Prague streets. The bag has metal pieces. The pieces are warm now. They go to the big church. The church is very tall. Polly flies above Václav. She looks for the woman. The woman wants their bag. Polly sees something important. There are stars on the church wall. The stars are old. Václav looks at the wall. He puts his hand there. The wall starts to shine. A door opens in the wall. There is a glass piece inside. Polly understands something new. The old clock needs these pieces. The clock tells time differently. Václav takes the glass piece. It fits with the metal pieces. The woman comes to them. She wants to buy the pieces. Václav says no. The pieces belong to the clock. The church bells ring loud. Strange lights appear in the city. They must go back fast. The clock tower waits for them. The street stones start to shine. The whole city has magic.