Bernadette feels sad when her classmates make fun of her for having an imaginary friend and being different, but one day a new little girl, Sofie, moves in next door, and Bernadette realizes that being different is not really strange at all.
Jane, who spends a lot of time alone as a child while her mother works as head of a Broadway theater company, develops a friendship with an imaginary man named Michael, and meets him again when she is in her thirties.
Halloween brings out the worst in fourth-grader Henry Wolowitz and his invisible, squash-eating friend Inkling, as Henry tries to go trick-or-treating while keeping Inkling from eating all the jack-o-lanterns.