After Fern and Sue ellen take a popularity test in a magazine for teenage girls, the two start changing, leaving their friends longing for the old Fern and Sue Ellen to return.

Arthur's wrong guess about the identity of the secret admirer sending him valentine messages leads to teasing by the other children, but clues in additional messages allow him to get his due.

Arthur and his friends try to find a substitute to attend the Father's Day picnic with Buster, whose father is not around much since his parents' divorce.

When Buster impulsively drops a Cybertoy into Arthur's backpack in the drugstore one day, he feels so quilty that he finally confessed to his friend and they try to return the popular toy before anyone else finds out.