So you wake up hearing your mother yelling at crime.

Yeah, then she just came into my room and she said, our father was killed and he is dead.

What's going through your head? Like, what are you thinking?

Putin. Putin did it.

On a cold winter evening in 2015, Vladimir Putin's number one public enemy, Boris Nemtsov, was shot four times right outside the Kremlin.

Prominent Russian opposition leader, Boris Nemtsov has been shot and killed by an unknown assailant.

I was in the White House at the time. I remember that people were in shock. Nemsov was a big deal.

President Barack Obama calling it a brutal murder.

It felt like Russia was descending into a new darkness.

And a sharp chill of fear has ripped across Russia.

But Boris Nemtsov's daughter, Jana, refused to be silenced.

I'm a Russian journalist and activist.

My father was Boris himself.

She had a story to tell about her father,

about a man who went from trying to create democracy

after the collapse of the Soviet Union.

The tricolor banner of the Russian Republic

now flies over the Kremlin.

To taking on Russia's richest and most powerful men.

We call them oligarchs, robberments.

They're buying up newspapers, airlines, oil companies.

A man who became Putin's most outspoken opponent.

...