It's 1969, school's out, and 13-year-old, NASA-obsessed Grace Kelly Donovan is already uneasy about the long summer ahead. Her dad is in Vietnam, her mom is distracted by the news, and all her long-time best friend wants to do is hang out at Lake Michigan with the popular kids. When Grace finds out that the local space camp has been designated "boys only," she is devastated. The one thing she thought might save her summer in the end—meeting an actual NASA scientist and hearing him speak—now seems out of reach. But Grace gets to work, engineering a plan that may bring her closer to her dreams—and show everyone that girls can break barriers.