As months pass on board, relations between passengers become increasingly tense and uneasy, each one being faced with his own part of darkness. Horror eventually escalates with the plants of one passenger coming to life and destroying one another and the presence incarnating itself into one of the plants and making it grow into a huge, hideous creature. The extraterrestrial mind eventually reveals itself to the entire crew, claiming to be one of Antheon's indigenous inhabitants.
As time progresses aboard, relationships between passengers become increasingly strained and uneasy, each one confronting their own share of darkness. Horror intensifies as plants among the passengers begin to come alive and destroy one another, with the presence manifesting itself within one plant and causing it to grow into a monstrous creature. The extraterrestrial mind eventually reveals itself to the entire crew, claiming to be one of Antheon's indigenous inhabitants.