A prison for women on planet 007 in the heart of the Xychromo Zone, Heart Knox purportedly houses an unusual number of political prisoners, which is not so unusual, if you know anything about the Xychromo Zone. While classified as a maximum-security correctional facility, Heart Knox is, for many of the more troublesome prisoners, merely a stopover on their way to much harder time, usually served on an Omega Disque.