In a near-future Asian megalopolis, Jack, a hired mercenary, lives a lonely and monotonous existence filled with robotic lovers and callous executions. Everything changes after he encounters April, a soulful Karaoke entertainer. But as his heart comes alive for the first time, his body mysteriously begins to break down. Finding himself pursued by robotic henchmen, Jack seeks out the help of Dr. Bergman, a reclusive scientist who may hold the answers to the mysteries of his past.