艾米和斯塔西是一对大学好姐妹,她们带着男友在墨西哥度假,遇见两个游客向他们求救。马提亚斯是德国人,他跟弟弟及另一个随从正在附近的一处废墟挖掘,做考古研究,但弟弟进入废墟后从此不见踪影。在马提亚斯的再三要求下,四个大学生答应出手相助。 Amy and Stasi are good sisters for a college pair who travel with her boyfriend on a holiday in Mexico and meet two tourists for help. Matthias was a German who had dug in a nearby ruin with his brother and one of his entourage, doing archeological research, but disappeared after his brother entered the rubble. Under the repeated requests of Matthias, the four undergraduates promised to help each other.