Jane Grace, a woman in her early twenties living in New York City, has the ability to shift in size between her normal height of five feet, four inches to a height of sixty feet. She uses this ability, with the blessing of the US government, to occasionally help out in the city, saving lives and generally helping people. The government, meanwhile, attempts to figure out how she gained this ability, headed by a reasonable man member of the Department of Homeland Security named Michael Kurland.