阿尔玛穆拉是南美神话中的骡妖，据说是由乱搞不伦关系的无德女人所变，她被上帝诅咒成为一只套着沉重铁链的骡子，在暴风雨夜晚的安第斯山脉徘徊，发现它的人都会被踢死。而所有它经过的地方，发生禁恋的人也会变成阿尔玛穆拉。纤细男孩尼诺由于受到恐同袭击，不得不和父母搬到乡下。当地森林据说常发生诡异事件，也有小男孩无故失踪。叛逆和好奇心让尼诺对传说产生浓厚兴趣，他期盼着能与骡妖相遇……
远离城市的小岛上，一个地产开发商和他的女友被三个手持猎枪的疯癫大汉追杀。不久，开发商惨遭毒手。只剩下看似弱小的女主角奋力求生，一路干掉所有坏人。
On leaving work, while Darío Manzano is taking drugs in the car, he receives an unexpected visit from Ginés Chega. At the same time that he points a gun at Darío′s face, he asks about his friend Abraham "El Gitano", whom he accuses of having stolen a lot of money. Manzano, without knowing what happened, cannot answer anything about it, and Ginés angrily gives Darío a head butt ...
