An all-new digital single - part of the New York Times best-selling series based on the blockbuster Xbox games!

The military-grade artificial intelligence known as Iona has only one week to live. After that the UNSC will legally terminate her seven-year existence in order to stave off the threat of the data corruption phenomenon known as "rampancy", a condition that will eventually take hold of her functionality and persona, endangering all those around her. In a last-ditch effort to save herself, Iona has successfully launched an unprecedented legal appeal against her own death sentence - a case being watched very closely not only at the highest levels of human government but by others with a very different agenda....