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 is unhappy about going on vacation with his family, but he shows them how to make the best of a bad situation when they end up stuck in a motel because of rain.
Fern dares Arthur and his friends to enter the poetry writing contest at the local library, but writing poems turns out to be harder than they thought.