Presents a novelization of the 2003 feature film in which the Rugrats find themselves marooned on an island after their cruise ship sinks, and their only hope of rescue, Nigel Thornberry, has suffered an accident that leaves him speaking baby talk.
Mary-Kate becomes upset when her plan for her camp to win the summer contest with the camp down the road appears to be jeopardized by her twin sister Ashley's behavior.
Michelle gains new respect for the teaching profession when her class pulls a series of pranks on Mr. Kowalski, a substitute teacher, and he responds by putting Michelle in charge of the class.
Michelle did not know that Natalie, a girl she made friends with at the beach, was really a movie star, but when she tries to make amends by throwing Natalie a fancy Hollywood-style party, Michelle learns she has made a big mistake.
