In the shadowed expanse of Neon Sacredum, the echo of a thousand neon hearts pulsed in rhythmic harmony. The Skyglow, a colossal luminous canopy, painted the cityscape with its ethereal glow, shrouding every inch in a spectral embrace. A faint haze of rain-kissed air enveloped the metropolis, amplifying the intricately woven web of lights that seemed to defy the oppressive night.

Beneath the neon nebula, a private investigator named Kael roamed the labyrinthine paths, his eyes locked on to the contemplative patterns of the city's dark heart. He was a seasoned thread-unraveler in this city of entangled enigmas and perplexing phenomena. A subtle shimmer danced in the silhouettes of colossal holograms that seemed to whisper arcane secrets through the melancholic music wafted through the alleys.

Suddenly, a cryptic message appeared on Kael's chronometer: "Answer the enigma." The neon hues amplified, swirling into an anomalous digital storm, illuminating the infrastructure and attractions. He received another cryptic hint: "Seek the source of the Night's Genesis." Unwilling to take any chances, Kael plunged headfirst into the labyrinth, his quest beginning anew. The city's neon heartbeat intensified, the lights intensifying the dark intrigue of the futuristic metropolis.