In a futuristic world where humans are colonizing distant planets, the story follows Mickey7, an "expendable" human who is repeatedly cloned and sent on dangerous missions. Each time he dies, his memories are transferred to a new body, allowing him to continue his work. However, when Mickey7 survives a mission he was supposed to die on and returns to find his replacement, Mickey8, already active, he must navigate the complexities of identity, survival, and the ethical dilemmas of his existence. The narrative explores themes of self-worth, sacrifice, and the essence of humanity in a technologically advanced society.