It's Christmas in NYC, but for Alpha Line it's anything but a Silent Night: The Agency has a mole, leaking classified information to toy manufacturers and film producers alike, and the Agents are in danger of losing their anonymity. To complicate matters, the Prime Minister of Lambda Andromedae III, complete with entourage, has arrived to negotiate a new trade agreement with Earth. Worse, the more paranoid Division One field agents look at Omega's recent history with the Agency and suspect they have identified the mole!Simultaneously, the discovery of a grim countdown in the most incongruous place possible -- the Christmas tree at Rockefeller Center -- augers the threat of horrific events on Christmas Eve itself.Meanwhile, Omega is struggling to adjust to her very first Christmas in the Agency, made more difficult by the exposure of parts of her past long hidden from her conscious mind.Will Omega be able to refute the accusations, or be punished for crimes she did not commit? Will the internal conspiracy expose the Agency? Or will efforts to thwart it see Echo -- and Fox -- caught up in the accusations as well? What is the meaning of the countdown to Christmas Eve, and will any of Alpha Line survive it?