Phineas and his brother, Ferb, are sitting under a tree. They are content and relaxed until they realize their dog Joey looks sick. Phineas and Ferb look inside Joey's doghouse and realize that it's extremely dirty. Suddenly, Phineas gets an idea. They'll build a new doghouse! The boys begin on construction and build the tallest, most luxorious doghouse known to man! The boys let Joey in, as he is eager to go. Joey looks at the many features, and Ferb tours him through. However, when Joey gets to the top, he falls and dies. Ferb says, "Oops!"