Two patients are fighting for their lives. Nina, the hospital nurse, reads their notes: Leroy: stab wound, gang member, police escort. Dev: stomach pain, artist, distraught mother. Nina is meant to treat all her patients equally: not to pick favourites, and not to judge. Except tonight, understaffed and overstretched, both patients need her. She makes a split-second choice - and leaves one man to die. And that's when she realises that on this busy hospital ward, no-one is exactly what they seem.