Two sisters, Stella and Marigold, do all the regular things, like go to school, but they also share adventures (both real and imagined) and secret sister things.
Second-grade best friends Ivy and Bean beg for ballet lessons, then, when they are cast as squids in their first recital, scheme to find a way out of what seems to be boring, hard, and potentially embarrassing.
After meeting Herman the Treasure Hunter during a career fair at Emerson School, every second-grader is looking for treasure and finding it--except for Ivy and Bean.