In 1969 twelve-year-old Mimi and her family move to an all-white town in Vermont, where Mimi's mixed-race background and interest in "boyish" topics like astronomy make her feel like an outsider.
On her family's farm in the town of Star, eight-year-old Mae eagerly follows the progress of the 1969 Apollo 11 flight and moon landing and dreams that she might one day be an astronaut, too.
In 1969, as her own family is falling apart, ten-year-old Mamie finds comfort in conducting a one-sided correspondence with the least famous astronaut heading toward the moon on Apollo 11.