From the day she was born, Hannah Mae O'Hannigan has dreamed of being the root-tootinest cowgirl ever. Too bad for Hannah Mae, she lives smack-dab in the middle of a city. But Hannah Mae's Uncle Coot lives way out West, and Hannah Mae is sure-as-sunshine determined to make it to his ranch. So with the help of her parents, Hannah Mae trains for the life of a rodeo star. She practices her horse ridin' with Sassafras — a sweet pony from the pony-ride in the park. Her stuffed animals are perfect for ropin' practice, and she masters cow herdin' by rounding up a bunch of pet-store hamsters. Finally Hannah Mae is ready to lasso her destiny. But when she gets to Uncle Coot's ranch, she is given only ranch-hand chores. Thanks to a mysterious herd on the horizon, Hannah Mae learns that with some quick thinkin' and some sure ridin', she can be the cowgirl who saves the day (and the frontier)!