While on a supply run for the Resistance, Riley, Mina, Marcus, and Daniel receive a strange SOS from a close ally. Something is definitely not as it seems, and their investigation leaves them with more questions than answers. It appears a ghost from Riley's past has risen to haunt her-one she cannot ignore. If she didn't kill him the first time, she will now. In another part of the galaxy, a high-level prisoner of the Dominion escapes and attacks...