In the third year of the apocalypse, radiation pollution covered half of the continent, and Omega became a "protected resource" for the survivor base due to its scarcity of fertility. Alpha Forester is a lone scavenger on the outskirts of the base, surviving by collecting supplies and scorning the base's hierarchical rules. During a scramble for supplies, he accidentally rescued the abandoned Omega Su Nian - she had no pheromone masking agent, but she was able to stay in the radiation zone for a short time. The two were forced to go together. Lin Ye's indifference gradually collapsed in front of Su Nian's tenacity. Su Nian also found the courage to survive under Lin Ye's protection. They have to face the attacks of radioactive mutants, the pursuit of base forces, and in the desolation of the apocalypse, they have to protect a bond between Alpha and Omega without "rules".
