Destroyer is a film by director Karyn Kusama that examines the dangerous and somber life of being a detective disguised among a gang of dangerous criminals.
The film follows Erin Bell (Nicole Kidman) as her last mission among a group of armed bandits back to haunt her when a face from her past has risen and threatens what remains of her life.
Already getting a lot of applause, particularly for Kidman's performance, we had to wonder how real it is to be so immersed in a criminal identity, despite being one of the cops trying to fight these people.
We talked to a disguised former police officer, Liam Thomas, about how accurate the film is.
"You can find intimacy (mental or not) with a colleague with whom you are suddenly a partnership that can be complex and problematic.
"You get addicted to the rush. Looking back, many of the officers I knew working undercover ended up in trouble.
"It can also be tricky to capture the distance traveled when you're immersed in this kind of environment, but I think the film deserves to be there with some of the best movies looking at a dark side of policing."
Thomas is full of nothing but praise for Kidman's turn as the disturbed Bell.
"Yes, it's an imposing performance by Nicole Kidman. I was moved by her interpretation of Erin Bell."
Thomas also discussed the impact of such a lifestyle on a person's loved ones.
"In many ways you deceive them as much as the world you infiltrate. It is not a recipe for harmony."
Liam revealed that he had been in some dangerous places when he was in disguise.
"I drank once in my drink trying to buy firearms that could have ended very badly and a case where police corruption compromised a meeting."
The work, it seems, requires a certain number of qualities.
"Patience, an understanding of the rules of evidence and calm you buy time in potentially stressful situations."
The ex-cop thinks it's worth trying to portray a lifestyle at the movies, though.
"I think cinema is able to accurately reflect any aspect of life with the right talent."
Thomas himself is now an actor and writer working in theater, TV and film, having recently created a theater company Sleeping Dogs to defend the voices of the North on screen, and also "currently writing a proof-of-concept roadmap based on my life previous".
When asked who he would like to portray him in a film of his own life, he had a great choice.
"As a young man, Jack O'Connell, a gifted talented person I can relate to, I think he would bring an emotional truth.
"As an older man, of course!"
Destroyer is out now in theaters.