The book "Frogs Pour! From the Amazing World of Unforeseen Phenomena" even by the mysterious standards of the city of Derby seemed particularly unexpected. Other scientists were found without explanation in Liverpool's Williams Square, when the weather suddenly started - giant frogs began to fall frantically from the sky. The doctors refused to believe their eyes, but this was only the beginning of a series of the most unexpected adventures. Hunting giant frogs, real grape wars and other wonders befell the residents of Derby when an aircraft from another world appeared on the horizon...