Phineas and Ferb build a translator to see if Perry's chattering noises actually mean anything, but discover it can work on other animals too. Meanwhile, Doofenshmirtz tries to flood the Tri-State Area so he can make it just like Venice, and to force everyone to buy his new Buoyancy Operated Aquatic Transport, or BO-AT for short.

Phineas and Ferb learn what the word "aglet" means and try to spread awareness of this to the world, while Candace uses the campaign as an opportunity to become famous. Meanwhile, Doofenshmirtz tries to get an embarrassing video of himself skating into a toilet off the internet by erasing the world's memory of its existence.