Getting a new baby in the house means a lot of big changes are coming, and you might not always feel completely ready for them. Arthur is feeling a little unsure about the new baby arriving in his family. While his sister D.W. is already excited to help out and take charge, Arthur is not so certain how he fits into the picture. Babies cry, they need a lot of attention, and they can be very confusing for an older brother who just wants things to stay the same. As the family adjusts to the newest little arrival, Arthur watches from the sidelines, worried he might do something wrong if he tries to help. But when the baby gets fussy and no one else can calm her down, Arthur might be the only one who knows exactly what to do. Find out how wonderful being a big brother can actually be in this heartwarming story.