You are Mister Mosquito, an uninvited guest in the Yamada family home in Japan. In order to store up enough food for the winter, you must drink as much of their precious blood as possible while they are in bed, talking on the phone, watching tv, or even a bath. The Yamadas know you are in the house and have plans to take you out. Deadly insecticides fill the air, and they have the ability to crush you like the bug you are.