Mimi and Lulu are best friends despite liking different colors and they love playing together, whether it's pretending to be on a phone or being princesses.

When a struggling student teacher assigns a group project, seven-year-old Just Grace gets so involved in working with Grace W. and Grace F. that she fails to understand why she and her best friend, Mimi, are drifting apart.

Eight-year-old Grace is excited to learn that her best friend, Mimi, is going to become an older sister, but when both try to be "mother's helpers" for a family renting a house on their street, little Lily likes Grace best, causing Mimi to doubt herself and Grace to form a plan to fix things.

Boo is excited about playing in the rain, while Pepper would rather stay indoors with the Cat until Boo finds a warm coat for Pepper--or the rain stops.