Christmas Eve usually brought warmth to most homes, yet for Dr. Felicity Warren it brought fluorescent lights, antiseptic air, and the relentless beeping of monitors at Bayview General Hospital. She had chosen emergency medicine years ago, knowing holidays would often belong to patients rather than family, but this year the cost of that choice weighed heavier than ever because her fifteen year old son, Jacob Warren, was supposed to spend the evening with her parents across town. It had seemed like a reasonable plan when her mother had offered to host dinner, promising that the house would feel festive enough for both of them, though Felicity still remembered the hesitation in her voice and the way Jacob had forced a polite smile while packing his overnight bag.