She'd stopped for coffee and a breakfast sandwich Aria probably wouldn't eat. The campus was still waking up, students drifting between buildings with backpacks and earbuds, oblivious to anything that wasn't their next class or their phone screens.
She climbed the stairs to the fourth floor and knocked on Aria's door.
No answer.
She knocked again, louder. "Aria. It's me."
Nothing.
She pressed her ear to the door. Listened. Heard something—thin, wet, barely there. A sound like air being forced through a space too small to carry it.
The spare key was in her wallet. Aria had given it to her years ago, back when they'd first moved her into campus housing. "In case I lock myself out," she'd said. "Or in case you need to check on me."
Serafina used it now.
The door swung open and the sound got louder—a high, strained whistle that came with every breath. Aria was on the floor between the bed and the desk, curled on her side, one hand clawing weakly at her throat. Her lips were tinged blue. Her eyes were open, wide with terror, locked on the doorway.
Serafina dropped the coffee and the bag. She was on her knees beside her sister in two steps.
"I'm here. I'm here. Don't try to talk."
She checked the airway—compromised, the swelling at Aria's throat visibly worse than yesterday, the goitre pressing hard against the trachea. Pulse rapid and thready beneath her fingers. Oxygen starving.
She called 911 with one hand while the other found Aria's fingers and held on.
"I need an ambulance. UC San Diego campus, Pepper Canyon Hall, room 412. Twenty-four-year-old female, respiratory distress, suspected tracheal compression from thyroid mass. She's conscious but her airway is closing. You need to move."
The dispatcher asked questions. Serafina answered them in the same flat, clipped voice she used at crime scenes—the voice that kept her functional when everything inside was screaming. Address confirmed. History confirmed. Paramedics en route.
She hung up and focused on Aria.
"Breathe slow. Small breaths. Help is coming. Stay with me."
Aria's hand tightened around hers. She couldn't speak. Every exhale was a fight. Every inhale was smaller than the last.
The paramedics arrived in six minutes. It felt longer.
They worked fast—oxygen mask, monitors, a rapid assessment that confirmed what Serafina already knew. One of them looked at her and said, "We need to secure her airway. We're intubating in the field."
Serafina nodded. She didn't let go of Aria's hand until they made her.
In the ambulance, she watched them slide the tube down her sister's throat. Aria's eyes fluttered as the sedation took hold—a moment of panic, then nothing. The monitors beeped in rhythms Serafina didn't fully understand, but steady was good. Steady meant alive.
They reached the ER in minutes. Aria was wheeled through the double doors and Serafina was left standing in the corridor, hands at her sides, face blank. The stillness she'd learned at a hundred crime scenes. The stillness that meant she couldn't afford to feel it yet.
A doctor found her twenty minutes later. Young, tired, direct.
"Ms. Montecristo?"
"Detective," she said automatically, then shook her head. "It doesn't matter. How is she?"
"Stable for now. We've secured her airway and she's sedated. But the surgery scheduled for Thursday can't wait. Her trachea is critically compromised—if we don't operate today, the airway will close completely."
"Today."
"Dr. Rao is being contacted now. If she can mobilize her team in time, we'll operate this afternoon."
Serafina absorbed this. Emergent changed the math—EMTALA meant they couldn't refuse. The prepayment requirement vanished. The debt didn't.
