Tiring of a newborn sibling who demands all her busy mother's attention, Ruby gets bored with endless solo activities and imagines creative ways to make her baby brother disappear, adventures that become so much fun that she decides to tag along.

Marnie is excited to go on a field trip to see the legendary palace of Queen Maretta with all her friends, but when her mom gets sick and cannot join the trip, Aunt Christabel agrees to come in her place--which could be a recipe for disaster.