He’s guarding the galaxy. She’s guarding her heart. Commander Dax Rossi lives by one rule: mission first. But when an old flame puts that code to the test, he needs to make a hard choice--the job, or the woman? Lieutenant Trinity West wants answers. Someone’s been stealing DNA from her top-secret research base, and she wants to know who, and how. Her investigation into the thefts is cut short by the arrival the only man to ever break her heart—and now he stands in the way of her discovering the truth.