In the year 3000, Earth's mega-city New New York runs on humans and advanced humanoid robots designed to think, feel, and serve alongside them.
Homicide Detective Dell Chromeheart, a blue-metal investigator with a human mind and an outdated sense of justice, is called in to solve a series of impossible murders.
When a vigilante known as Night begins executing criminals who escaped justice, Chromeheart uncovers a truth no one is prepared for: the case is tied to his partner, Detective Horace Day, who unknowingly becomes Night every time he falls asleep.
As the investigation deepens, memory gaps widen, identities fracture, and the line between justice and murder collapses. Chromeheart must confront a killer who is also a victim-and a system that refuses to stay still long enough to be understood.
In a city where even minds can split, solving the case may cost more than truth.