Selina Kyle stands in front of a full-length mirror, her eyebrows furrowing as she examines her reflection. The sleek, black catsuit she's known for seems snugger than usual. "This can't be right," she mutters, pulling at the fabric. Her agile fingers trace the seams, a hint of frustration in her gaze.

Selina leaps from building to building, her movements slightly less fluid than before. She lands beside Batman, who stands brooding on a gargoyle. "You called?" she quips, trying to mask her discomfort. "I've noticed some changes," he replies, his voice a mixture of concern and curiosity.

Selina watches as Dr. Langstrom, a biochemist with wild hair and intense eyes, analyzes her blood samples. "It's a metabolic anomaly," he explains, adjusting his glasses. "Something in the city's water supply, perhaps?" she suggests, her mind racing with possibilities.

Selina confronts Oswald Cobblepot, known as The Penguin, who's orchestrating a smuggling operation. "This ends tonight, Oswald," she declares, her voice firm. But her agility is tested as she dodges his goons, her movements heavier than before.

Selina sits on the couch, sipping tea thoughtfully. The anomaly's effects are wearing off, thanks to an antidote from Dr. Langstrom. "Guess I'll have to watch what I drink," she muses with a wry smile, feeling more like herself again.

Selina stands at the edge, her silhouette sharp against the morning sky. "No matter the changes, Gotham will always be my playground," she whispers, her resolve as strong as ever. The city below is waking up, unaware of the night's revelations.