While Henry's parents are at a Sweetheart Dance on Valentine's Day, he and his dog Mudge have a wonderful time staying at Mrs. Hopper's house, where they enjoy tea and music and dressing up in various costumes.
Although ten-year-old Angel loves her little brother Rags dearly, the constant responsibility of taking care of him weighs heavily on her young shoulders.
Nelly's clients are wonderfully behaved even though they are monsters, but when she is asked to sit for a bad-tempered little boy, she calls for reinforcements from her other clients to show him how real monsters act.
Kristy starts a softball team for her little brothers and sister. Soon they are challenged to a real live game by the Bashers, and Kristy has a crush on the Bashers' coach.
When a fight breaks out among the members of the Babysitters Club, timid Mary Anne finds herself becoming more assertive as a baby sitter and in her relationships with her father and friends.