好不容易聚在一起的克隆人姐妹面临新的威胁。　　正当Sarah和同伴们开始拼凑阴暗的Dyad研究所背后的复杂阴谋时，她们发现了“Castor计划”。这是一个绝密军事项目，正在制造训练有素的男性克隆人。在无情的Coady 博士的监视下，“C…

　　Four 22 year-olds on a Mexican road trip seem bound for disaster until they, and their trip, are unexpectedly redeemed by a series of miraculous events.