The first half is a horror thriller with the theme of outdoor adventure.
The second half is about several people being seduced by the red spore bacterium. The story of An An and Wu Tong being parasitized and pregnant by poisonous mushroom spore legions and giving birth to humanoid spore monsters. An An and Wu Tong became surrogate hosts for breeding humanoid spore monsters. The story of a bloody killing among companions.
Another important significance is that as the sheep leaves the redwood forest and goes to the city, he inhales a large amount of red spores in the redwood forest and drinks too much red drink. Once he leaves the redwood forest, he has mental problems. He cannot remember anything, and he becomes mentally ill. The deeper meaning is to call on people to respect and protect the virgin forest.
