Set in a wintry, haunting Prague, the mysterious Piper arrives at New Year’s Eve in a red car and meets Agnes and Kristian, who are struggling with social rejection and a pending marriage. Using his magical flute, he purges the city of rats—and later, corrupted townspeople—demanding a personal sacrifice in return for love and redemption.

The story takes place in a metallurgical plant where important technological changes are being made while the plant is in full operation. However, a mistake in the project puts the entire plant at risk, as a gas explosion threatens. All the workers then forget about any potential rifts and join forces to prevent the worst...