Twins Emily and Sam decide to bet on who will win the class spelling bee, with the loser having to write a fable for their class assignment. They soon learn that they have to decide between winning and supporting their sibling.

Emily loves reading, so she's excited when her teacher announces that the class will be reading fables. Her brother, Sam, is less thrilled. He prefers spelling to reading. In fact, because he loves learning spelling rules, he's sure he'll win the upcoming spelling-bee. But Emily thinks her reading skills will give her the upper hand.

Emily gets right to studying, but the spelling list is harder than she expected. Meanwhile, Sam is preoccupied with a new classmate. This bet might be more than either sibling bargained for!