In 1929, an expedition of university botanists enter an uncharted forest where they discover, and must escape an ancient organism.

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孤儿萨曼塔，和她的养父母以及妹妹奥利弗住在一起，但是他的养父并不喜欢她，老是责骂她。由于他们的家位于森林深处，所以回家必须经过森林，但是，他们不知道森林里有树怪，他们能诱捕儿童，然后把抓到的孩子困到他们的巢穴，然后再幻化成孩子的模样，回到他们的父母身边，所以数百年来，这片森林数百年来都有儿童走失的案例，不幸的是，由于萨曼塔的疏忽，让她的妹妹独自穿过森林，然后就被树怪掳走啦，接着就发生了一连串死亡事件，那么萨曼塔一家能够逃过一劫吗？

　　On a weekend getaway at a rundown cabin in the woods, Jason, a cautious teen, his crude best friend Colin and his fearless older sister Summer are forced to work together, grow up and save their hard partying parents from their predatory neighbour (Lauren Holly) who is intent on feeding them all to her undead family…