In a wasteland future where civilization has collapsed and mechanical debris piles up, a cleaning robot "Zero" that is supposed to be emotionless accidentally acquires self-awareness. She crawled out from the piles of similar wreckage, carrying a mysterious core that recorded the coordinates of the "Ark", and embarked on a journey to find the legendary last pure land. However, deadly mechanical stalkers, greedy ruin hunters, and a mysterious network of abandoned AIs all try to dismantle her and seize the secrets in her heart. This is a rust-colored legend about awakening, survival and the pursuit of meaning.
