The opening scene of "Opposition" by Jennifer L. Armentrout sets a vivid atmosphere that engages the reader's senses. The description of a dimly lit tunnel filled with the unpleasant odors of mold creates a sense of foreboding and discomfort. This sets the tone for the events that are about to unfold, suggesting that the characters may encounter challenges that are not only physical but also psychological.

The imagery of the tunnel also reflects the theme of darkness and the unknown, which are central to the story's tension. The humorous twist in describing the smell adds a layer of relatability, allowing readers to connect with the characters' experiences. It hints at the mix of seriousness and lightheartedness that Armentrout is known for, inviting readers to delve into the adventure that lies ahead.