He's on a suicide mission, and Shepard needs all the help he can get. One of his potential recruits is a strange young scientist specializing in synthetic lifeforms - a scientist who is not at all what she seems, and knows far more than she lets on...

Betrayed by a machine hellbent on proving itself not just to Earth but to the Galaxy. Now, it's up to John and Cameron to figure out what happened in a future they never thought they'd witness, and fight an enemy they could never fathom.

Reprieve comes in the strangest of vessels. At least for Commander Alexandra Shepard.