Caleb (a human) and Mezoke (a Sandjarr) are paired up and trained as special agents to keep the intergalactic peace. This is a controversial and historic alliance given their races' longstanding enmity, and a lot of people are watching them. Their first mission is to keep war from breaking out between humans and Javlodes on the planet Senestam. Caleb acts as a mediator between the warring factions while dealing with an attack by Stilvulls (highly destructive insects)–and he also has to contend with his feelings for charming doctor Kim Vandersel. Mezoke is on the planet Upssal, trying to appease the Javlodes