Scientists at a secret underground complex have found a way to travel to another dimension. Three dimension-travellers are the first to go through the gate - but are soon attacked by something that interrupts the communication with Earth. This horrible something uses the gate to travel back to the underground complex. Most of the staff are evacuated, except four heavily-armed militaries and Dr. Casserly and Dr. Summerfield who just can't stand each other...直道张小飞穿着防护服，却依旧隔着一扇门透过玻璃看到里面一个纯白色的房间里的，正坐着一个约么有个七八岁的小男孩，此时对方看不出任何的异常，像是正常孩子一样里面摆满了不少的玩具，但是能够看出来这些玩具都是精心挑选过后进行了全面消杀之后才放进去的。