A year has passed since Nellie Nova built her time machine, the Purple Flyer. She and her brother, Niles, have been busy traveling throughout history to meet amazing women. Everyone in the Nova family, including their "Auntie" Amelia Earhart is very happy that the pesky government agents who tried to steal their time machine last year have finally backed off. One day, after traveling in time to meet the Native American trail guide Sacagawea, Nellie and Niles return home to find out that Agent Riley and his team of operatives are back in town and they've come for the Novas! Ruthless as ever, the agents chase Nellie and Niles through town, park their car in front of the Novas' home, and even show up to Nellie's dance recital. The Novas have had enough, so they pack their bags and head to Washington state to hide out in the mountains for the summer.
Worst of all, Nellie's parents forbid her and Niles from using their time machine until things settle down.
Will they ever get away from the agents? And will Nellie ever be able to use her time machine to meet her newest heroine and namesake, reporter Nellie Bly?