Emma is not thrilled with always needing to rearrange her schedule to babysit her younger brother, Jake. Now Emma's parents have broken the news that really threatens to push Emma over the edge--since Emma and Jake are going to the same day camp this summer they will take the bus together, and Emma has to sit with Jake. Which means not only can't she sit with her friends--she has to comfort Jake who gets "bus sick" on a regular basis!