George's very impressed by the model papyrus boat that Steve has built for history class. Steve wants to find a way to test the boat out but when he's unable to in the museum he decides to go to Endless Park. But a stray current caused by a rainstorm sends the boat on its way down the river & down a storm drain. Steve & George try to find the boat at the local waste treatment plant but due to the recent storm, the boat has completely bypassed the plant & floated out into the ocean. There, the waste treatment facility uses a skimming boat to collect floatables-trash that people have dumped into the ocean. They decide that Steve's boat may be floating in the ocean somewhere.