After a short prologue during which Charlie Brown convinces sister Sally to get ready for the last day of school, It Was a Short Summer, Charlie Brown moves to the end of that day, as the children race gleefully away from books and homework and begin planning how they will spend their precious free time. Linus intends to read comic books and watch TV, Charlie Brown is going to develop his pitching arm, and Schroeder will work on his piano technique and perhaps write a concerto. Then Lucy appears and ruins their plans by announcing that she has signed them up, one and all, for summer camp. The boys are distressed -- Linus worries about dreaded queen snakes and the possibility of his parents moving while he's gone and not telling him. Snoopy seems to be the only one pleased about the possibility. Things get off to a bad start at camp when Charlie tries to enliven the boys by getting them involved in a swimming race against the girls -- and the girls soundly thrash them. This sets a pattern as the girls subsequently defeat the boys in everything else, from softball to a canoe race. Eventually, there's only one chance the boys have to redeem themselves -- by pitting their champion wrist wrestler, the Masked Marvel (Snoopy), against the mighty Lucy.
by Craig Butler synopsis