A fun new boy has just moved in next door to Grace's best friend, Mimi. When Grace has to go away on a family trip during school, she is terrified that when she comes back Mimi will be best friends with Max instead! After her trip, not only does it seem her fear has come true, but Mimi is even friends with the disgusting Sammy. Now Just Grace has to team up with two other Graces in her third-grade class for a school project, including the Big Meanie....

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.

It's time for the school fair, and Just Grace's class has chosen a cupcake theme. But the fair's highlight, a cupcake competition, causes quite a stir when Grace gets paired with dreadful Owen 1 and not with her best pal, Mimi. Grace is devastated. And just when she thinks things can't get worse, her team votes down her idea to build a cupcake Eiffel Tower in favor of building Spiderman. It's a challenging time for Grace. Will she be able to overcome...

The finalists face surprises as they find their culinary knowledge, ingenuity, and friendship tested in the final week of competition that will determine who earns the title of Next Best Junior Chef.

The second week of Next Best Junior Chef features family and traditions, as Caroline, Oliver, and Rae, ages eleven to twelve, face more challenges and another elimination.