Kevin hires a tutor for Mary-Kate. Ashley convinces Mary-Kate to switch places so she can flirt with Taylor, the tutor, but their scheme doesn't go as planned; Carrie convinces Kevin to ask out a woman at a coffee shop.

Ashley becomes jealous when, during a slumber party, Mary-Kate reveals that she has kissed a boy; After Paul finds out Carrie was over at Kevin's he assumes their relationship is more than it actually is - which leads to rumors about them being a couple.

When Kevin starts dating a woman, Marci, they fear that she will replace Carrie. The twins scheme to destroy Kevin and Marci's relationship.

Mary-Kate and Ashley switch costumes with Max and Brian so that they can attend Carrie's Halloween party, from which they were banned by Kevin.

Mary-Kate, who has had a bad past with animals, gets a homing pigeon which eventually flies away, causing heartbreak to Mary-Kate.

Ashley makes a new friend, Nicole, which leads Mary-Kate to feel jealousy; Eddie and Kevin argue while Carrie tries to be a mediator.