As twilight cast a deep orange hue over Metropolis, Batgirl and Supergirl stood side by side on a rooftop, their silhouettes framed by the sprawling cityscape. The air was crisp and filled with the distant hum of city life, punctuated by the occasional whirr of a passing helicopter.

Batgirl, her suit gleaming in the fading light, was intently monitoring a series of screens mounted on her utility belt. Her fingers danced across the controls, bringing up detailed maps and data streams. She glanced at Supergirl, her expression a mixture of focus and urgency.