Two short lines set the scene: a white haze hanging over the mills of an industrial park. Nothing dramatic happens. The speaker simply looks and then asks a question that won't settle: is this holy water, or a form of plague?
The question is what makes the poem. A white haze could be mist, steam, or smoke, and it could look almost beautiful, like a blessing spread over the buildings. But the speaker can't fully trust that impression. The word "plague" suggests the haze may be pollution, something sickening that hides behind a calm surface. The poem never picks an answer, and that refusal is the point.
The mood is uneasy and quiet. The speaker seems caught between awe and dread, unsure whether to admire what they see or fear it. With so few words, the poem leaves a lot of empty space, and the unanswered question lingers there, much like the haze itself.