"As a heartless killing machine, I was a complete failure."
It has a dark past—one in which a number of humans were killed. A past that caused it to christen itself "Murderbot." But it has only vague memories of the massacre that spawned that title, and it wants to know more.
Teaming up with a Research Transport vessel named ART (you don't want to know what the "A" stands for), Murderbot heads to the mining facility where it went rogue.