Coming from a long line of brilliant doctors, Lexie Grey-Shepherd always knew medicine would be her future. Choosing Pittsburgh Trauma Medical Hospital over Seattle Grace Hospital was the hardest decision she'd ever made. She expected long shifts, impossible cases, and the pressure of proving she belonged. She didn't expect Mateo Diaz. Charming, steady-handed, and impossibly gentlemanly, the trauma ER nurse is known for calming chaos with a smile and making everyone around him feel safe. The moment Mateo sees Lexie, he falls hard and without hesitation. To him, Lexie isn't just another resident. She's sunshine in hospital hallways, warmth after endless night shifts, and the kind of love he knows only comes once.