Geronimo Stilton : Heromice - Flood Mission (#3)

Muskrat City is under attack again. The Sewer Rats have created a weather-changing device that unleashes huge storms, which will likely flood the entire city! The rodents of Muskrat City have one hope: the Heromice. Can Geronimo Superstilton, Swiftpaws, and Lady Wonderwhiskers save the city?