娜拉，一个来自城市的13岁女孩，和她的家人一起去乡下奶奶家，试图找到治疗妹妹神秘疾病的方法，但她很快就会发现奶奶并不像她看起来的那样。

On the rainy night of October 2, 1968, eight characters waiting on a remote bus station for a bus heading to Mexico City start experiencing a strange phenomenon.

兄弟二人生活过的紧巴巴，弟弟生性懦弱，哥哥强势霸道，这天，哥哥抢劫别人得来了钱，兄弟二人正高兴之际，一名侦探找上门来，双方发生争执，追逐之中，三个人发现自己被困于无穷无尽的楼梯上，无论如何都走不到尽头 ……　　另一边，一…

Nala, a 13-year-old girl from the city, travels with her family to her grandmother's home in the countryside, to try to find a cure for her little sister's mysterious illness - But she'll soon find her granny is not exac…