The train was nearly empty that night. The lights in the carriages dimmed, swaying gently as the metal wheels rubbed against the rails. Agam sat alone in a window seat, his laptop closed.

He was on his way to another city to check on the reconstruction of illegal cash flows. This should be a quiet ride. But he heard a small voice from the bench two rows in front of him.

Click. Click. Click.

Typing sound.

Agam peeked without turning around.

A foreign woman sat alone too, earphones in, face serious, her fingers moving quickly on the laptop.

Not strange.

The strange thing is... what she is typing.

She was opening a spreadsheet document.

But not a regular spreadsheet.

Agam recognized the number pattern. A very specific pattern.

Characteristic pattern...

money laundering patterns using multi-country layering methods. It's a pattern that even many analysts are unaware of.

Agam narrowed his eyes.

The woman retyped the numbers WITHOUT looking at the reference. From memory. She was mapping out a multi-layered black money scheme as if it were basic math.

A row is placed with a structure that... ...almost exactly the same as the structure Agam is investigating.

In his head, professional alarms immediately went off.

Who's she? Why does she know that pattern? Why did she write it in a public place like this?