Nineteen-year-old returning champion Sean Kendrick competes against Puck Connolly, the first girl ever to ride in the annual Scorpio Races, both trying to keep hold of their dangerous water horses long enough to make it to the finish line.

Mattie, a shy fifth-grader, wants to hide out at her new school by acting as apprentice to her Uncle Potluck, the custodian, but her plan falls apart when she summons the courage to speak about what matters most and finds a true friend.

In love with the girl he sneezed on the first day of school and best pals with Marshall, the "One Eyed Jack" of friends, seventh-grader Milo Cruikshank misses his mother whose death has changed everything at home.