When an industrial robot named Monroe begins to work at his father's factory, Satoru is fascinated. As he and his friend Marin spend more time with Monroe, they start to suspect there's much more to the machine than anyone else realizes. But neither children nor adults are prepared for Monroe's violent awakening into consciousness.

Satoru has been meeting up with Marin at his father's factory to spend time with the curious robot Monroe. But their secret has been misinterpreted by the town gossip mill. As rumors start to spread about a budding romance between the two, Marin makes a decision that will forever impact her relationship with both Satoru and Monroe, changing all their lives in unexpected ways.