Sydney and Dixon go on a dangerous case involving the safety of the United Commerce Organization. Francie confronts Charlie about his secret date with another woman, and Will continues to get closer to the truth about Danny's murder.

Sydney briefs her CIA handler, Agent Vaughn, on her recent captivity at SD-6 and is surprised when he unexpectedly gives her a Christmas gift. Meanwhile Jack has to find a way to save Sydney when he discovers that Sloane has ordered her tortured and killed for being the suspected SD-6 mole. Will may be making the mistake of his life when he begins to research a name heard on a mysterious audiocassette -- SD-6.