"Is it true that the loss of one sense sharpens the others?"

Natalie Dormer stars as a blind pianist in the upcoming thriller, In Darkness, and in this exclusive first trailer, she may be the only person who heard anything after her neighbor (played by Emily Ratajkowski) turns up dead. Dormer's Sofia may be caught up in something far bigger, however, and as she navigates a hit man (Ed Skein) and war criminals, her own secrets will come to light.

Dormer co-wrote the film, her first feature screenplay, with director Anthony Byrne. (Who is also her partner.) "That was the cherry on the top of the cake," she told ET's Nischelle Turner. "I'm so in awe of Anthony as a director. I think he's fantastic and so talented and, you know, I got this acting sh*t slightly under control. The interesting part was writing together."

"It was like a baby had, like, taken seven and a half years to get to that first day on set," Dormer explained during her sit-down with ET. "It's so personal and you're so appreciative of the crew and the fellow actors, because it really feels like it's yours."

The actress wrote the script years before she would eventually break out on Game of Thrones, at a time when she was frustrated with the types of roles she was being offered. "Hold on to your hats for a moment. Imagine life before Game of Thrones," she said with a laugh. "It was before I did The Hunger Games. So, I was fully anticipating that I was writing a female part and a story that I would want to watch, but I wouldn't have the honor of playing."

It was only after finishing her work on the HBO series -- Dormer's Margaery Tyrell was killed off at the end of season six -- that she thought she might have "enough clout" to lead her own film. "That was like Christmas. Thanksgiving," she said. "That was everything at once." (As for the upcoming final season of Game of Thrones, Dormer teases, "I know stuff I wish I didn't know...It's really exciting. And I'm going to be sitting on that sofa like the rest of you going, 'How do they do this?!'")

In Darkness is in theaters on May 25. Here is the movie's official synopsis:

"Blind pianist Sofia (Dormer) overhears a struggle in the apartment above hers that leads to the death of her neighbor Veronique (Ratajkowski). It is the start of a journey that pulls Sofia out of her depth and brings her into contact with Veronique’s father, Milos Radic (Jan Bijvoet), a Serbian businessman accused of being a war criminal. Sofia is drawn into a dangerous world of corruption, investigating police, hitmen and the Russian mafia -- a world with links to Sofia’s own hidden past and a path of revenge she has kept hidden until now."

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