On a quest to find the father she thought was dead, a determined young girl uses a mysterious device that allows travel between worlds but unknowingly unleashes a monster from one of those worlds that haunts her every step.攻进基地中的变异马和丧尸数量在几百只，再加上内部搞破坏的那些，它们确实是嚣张了一会儿，不过随即它们就被压制下去，火力点上的机枪响起来，留在外面的丧尸和变异马受到打击，坚持了不到十分钟，它们就开始撤退。