In a world where animals and plants have disappeared, the remaining humans live in a closed city under a plastic dome. The cost of their survival is extremely high: when the citizens of this city reach 50 years old, special seeds are implanted into their bodies, turning them into trees - thus providing the community with oxygen and food. Youngster Stefan accepts these dystopian city rules unconditionally. However, when his wife Nora decides to give up her life and voluntarily undergo the first implantation, he decides to rebel against the system to save his loved one's life.