A freshly commissioned Planeteer and his peers leave a rotating orbital platform to join a space cruiser, facing veteran spacemen's hazing, the dangers of high vacuum, and a perilous assignment that may avert interplanetary conflict. The plot mixes fast-paced shipboard action, daring repairs, and tactical encounters with hostile forces, while scenes of mentorship and training highlight resourcefulness, loyalty, and the tension between procedure and instinct. Episodic adventures test the young officers' courage and teamwork.