Jessi is thrilled when she earns the lead in her dance school's ballet. But someone does not want her in the show and the Baby-sitters Club intends to find out who it is.

"Becca, Zack, Cam, and Thomas are best friends who may seem like an unlikely group on the surface but who have something very important in common: a love of history! Together, they make up their school's history club that has an all-important secret mission: stop the villainous History Twister's plot to destroy the past, forever altering the future. Knowledge of history is their superpower as they chase the Twister through time. After all, who knows...