This is a flashback origin case, set before the formation of SID.

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At this point in time, Yang Tin Kei is still with Old City CID, and Chang Hsin-Yan is still serving in East City CID’s Criminal Profiling Unit.
They are not partners yet.
Not even familiar, really.
But both are already sharp, dangerous, and deeply solitary.

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Everything begins with a disappearance so clean that it feels wrong.

 

Alan Ho, the son of powerful real-estate tycoon Kelvin Ho, vanishes from his own penthouse apartment.
No struggle.
No blood.
No cry for help.
Only a three-minute CCTV blackout, a briefly triggered balcony door, and a whisky glass still warm on the bar.

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Then a second kidnapping strikes.
Sun Yi, a cybersecurity CEO, is taken from a tightly controlled tech complex through a flawlessly executed systems shutdown.
Then a third.
Ken Holmes, a transport magnate, is effectively erased from his own convoy route at the port.

 

Three victims.
Three strategic sectors.
Real estate.
Cyber infrastructure.
Transport power.

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What first appears to be a kidnapping case quickly reveals itself as something far more dangerous: a deliberate extraction campaign targeting the city’s critical nodes.

 

As the investigation deepens, Yang and Chang uncover the outline of a transnational syndicate operating through ports, maritime routes, encrypted systems, shell companies, border corruption, and mountain strongholds:

 

Krahu i Shkabës — The Wing of the Vulture.

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This is not an ordinary criminal gang.
It is a disciplined, paramilitary-style network built around one brutal principle:

 

Control the route, and you control life and death.

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From luxury residences to underground server facilities,
from container yards to dark-sea corridors,
from intelligence rooms to abandoned warehouses,
from sniper-haunted mountain roads to a Cold War bunker siege,
the case escalates step by step until it is no longer about finding missing men.
It becomes a war of dismantling an entire extraction machine before it can disappear again.

 

Yong Tin Kei drives the case through tactical instinct, pressure, and relentless field judgment.
Chang Hsin-Yan breaks it open through behavioral logic, structural analysis, and cold precision.
Through repeated clashes and alignment, they begin to recognize each other—not romantically first, but operationally, deeply, irrevocably.

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By the end, all three hostages are rescued alive.
The Wing of the Vulture is decapitated within this operational theatre.
Its Nine Feathers are broken, and Sokol Berisha is killed.

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But the victory is costly.
Some survivors are permanently scarred.
Some lives can never return to what they were.
And both Yang and Chang leave this case changed.

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Wing of the Vulture is not merely a kidnapping thriller.
It is a contained transnational war.
And it is the case that plants the first true seed of what will one day become SID.