The speaker is caught in a loop. The poem opens with familiar sights and smells, and the title's "& again…" sets up the sense that this has all happened before. Something cuts at the throat and unsettles the heartbeat, which suggests a physical reaction to memory, though the poem never says what the memory is.
The speaker braces for a "promenade of bullshit cavalcades," a scornful phrase for the parade of thoughts and excuses that always follows. Even as the world keeps turning, they hunt for "another way to escape" and end up saying the same thing again. That repetition is built into the poem itself.
The turn comes near the end: the images have faded, but the feeling hasn't. It's called a "relentless bastard" that "refuses to be purged." The mood is tired, bitter and stuck, and the poem leaves us with emotion that lingers after the story behind it is gone.