With a government assignment, you are sent as a four-person team to investigate a state nuclear weapons depot where communication has been lost. You enter the tunnel where the nuclear depot is located through the depths of the forest. However, you find that the tunnel is occupied by predatory animals and various creatures. You learn that there is a hidden agent among your team, and things become even more complicated. Now you have two objectives: find the agent among you and uncover the secret of these creatures. 展开