Florian Josh and Clay must tackle small mysterious round objects floating close to the hull of the USS Lock by going into space and collecting them by hand. Discovering Captain Evans is about to test fire the USS Lock's engines, Josh must convince him to halt the diagnostics of the ship which will see the Lock postponing her trip back to the earth. A heated discussion about losing another shuttle doesn't make for a settled colony. Will one of the colonists survive after insisting he's fights the alien walking amongst them?