[1] The brother and father of Reiko, a teenage girl, died not long after she was born.

Ten young space cadets are put onto a decommissioned spaceship as their final test.

If they pass this test, their lifelong dreams of being valued people in their respective societies will come true.

The crew suffers hyperthermia because their ship is too close to a star, and they must find out which of their number is the spy.

[5] Shaenon Garrity describes it as being "an odd mix" of stories, attributing this to the "very little" amount of shōjo manga available in English at that time.