Under the frozen glow of Advent in Zagreb, an unexplained blackout halts a night train from Hungary.
Field investigator Adrian Vale carries a device that reacts to unseen frequencies — the Veiled Compass.
Alongside local historian Mia Blazek, he follows a coded pulse hidden in the city's tram lines, discovering a link to Nikola Tesla's lost experiments.

But the lights of Zagreb conceal more than holiday magic.
A rogue ex-intelligence officer, Luka Radan, has tapped into the same signal, seeking to weaponize Tesla's research and reshape the modern grid.
From Zrinjevac Park to the Cathedral crypts and the roaring Tesla Museum, Adrian and Mia must decode a symphony of light before sunrise — or watch the city collapse beneath it.

The Veiled Compass: Zagreb — The Tesla Light begins a global thriller series where every city hides a secret, and every light remembers.

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