On a journey that spans the formative years of their lives, two sisters navigate their loving but volatile father during their yearly summer visits

　　从隐蔽的美国空军基地毕业的学生，必须保护一种基因编辑生物武器，免受俄罗斯军方的攻击。俄罗斯军方正不惜一切代价夺取这种致命的病毒制剂。