The scene is a midtown station.
The time is 3 a.m.
Jane is alone on the platform,
Humming a requiem.
She leans against the tiles.
She rummages in her purse
For something to ease a headache
This line’s importance will reveal itself at the poem’s conclusion. 
 A requiem (especially in the Roman Catholic Church) is a mass for the repose of the souls of the dead.
The Couple