You are Mister Mosquito, a uninvited guest in the Yamada family home in Japan. In order to store enough food for the coming winter, you need to drink as much of the family members' precious blood as possible while they are in bed, talking on the phone, watching TV, or taking a bath. The Yamada family knows you are in the house, and they have plans to take you out. Deadly insecticides fill the air, and members of the family can crush you like a bug (well, actually, you are a bug). You want a taste of their plasma, they want you dead--something's gotta give. You can fly through and explore the 12 levels of the Yamada household searching for victims and using stealth to get the job done, or prepare for air combat as you do deadly battle with human inhabitants. Watch as family members' relationships disintegrate as they take out their irritation on each other.