Whew, boy is it HOT today. The Reads decide to head to the beach in order to cool off, but D.W. refuses to go along (she thinks there is an octopus in the water).

D.W. has an imaginary friend, Nadine, says she has to come everywhere, but Arthur is sick of it.

Arthur and his friends go to summer camp and Binky brings up the issue that it's boys vs. girls. The other team participating always won because of this problem, so now the kids of Elwood must work together to defeat them this year.

When Pal runs away at a street fair, even Arthur starts to doubt his dog's intelligence.