Two years ago, the Mugg Brothers, who have never worked a day in their lives, inherited a brownstone apartment building. In that short time, their slacker ways have run the building into the ground. Tenants are moving out, no one drinks at the bar downstairs, and the building's pets are going missing. If all that isn't enough to make them sit up and take notice, they soon discover a mysterious creature is hiding in the basement and trying to eat every living thing in the building one by one. Now it's up to them to stop this creature, before it eats all of their paying tenants!