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Mr. Gus knocks on the bathroom door and asks Uncle Grandpa if he is done and complains that Uncle Grandpa has been in there for a week.Uncle Grandpa tells him he'll be out in 2 minutes and 45 seconds and goes back to playing with his rubber ducks in the bath tub. Out of all the rubber ducks, he declares one named E-Mail as his favorite and gushes about how much he loves E-Mail.
Suddenly, a tentacle shoots out of the bathtub and grabs E-Mail and pulls him down the drain. Uncle Grandpa takes a deep breath and submerges himself into the bath tub, swimming down the drain into an underwater aquatic world where all the sea creatures look like him. There, he finds Pizza Steve glumly sitting in a diver's helmet. Pizza Steve quickly snaps back to his normal self before Uncle Grandpa can realize he was upset. Uncle Grandpa asks him where E-Mail went. Pizza Steve points to the cave and Uncle Grandpa swims to it.
There he finds E-Mail in the Octodad's clutches. He takes E-Mail and swims away, leaving the Octodad angrily shaking his fist and screaming about giving him back his son. His son, the Octoson, comes up and tells him that he is not E-Mail. The dad hugs him and cries. Uncle Grandpa swims back up to the surface, but accidentally swims up to the kitchen sink instead of the bathroom, and the short ends with Uncle Grandpa making a pun on "fin"