Elizabeth Hurley Sizzles in Son Damian Hurley's First Movie Strictly Confidential: Watch the Trailer (Exclusive)

Damian Hurley cooked up a seductive new thriller — and enlisted mom Elizabeth Hurley for a key role.

PEOPLE is exclusively debuting the first trailer for Strictly Confidential, which is billed as a "sensual thriller with a devilish twist" and serves as the feature directorial debut for Damian, 21.

As the plot goes, "On the anniversary of Rebecca’s (Lauren McQueen) death, Mia (Georgia Lock) returns to the Caribbean paradise where she and her best friend shared her final days."

"As Mia and sets out to unravel the mysterious events of her passing, old passions rise, new secrets are uncovered, and Mia is pulled into a seductive world of sex, betrayal and murder."

Damian tells PEOPLE that his movie-star mom, 58, "promised" years ago that she'd star in his first film, and she "dropped everything" to participate.

"During the making of my first-ever short film back in 2010 when I was 8, my mother promised me she’d be in my first feature. True to her word, the minute Strictly Confidential was green-lit, my mother dropped everything and raced out to the Caribbean to help," he says.

While he says the "power dynamic" between a director and an actor can be "complicated at the best of times," Damian says about working with his mother: "It was a joy to come to work and tackle each day together."

"We only had 18 days to shoot the whole film, so our twin-like telepathy was invaluable throughout," says Damian, who also worked with Elizabeth on her series The Royals.

The actor-model acknowledges that writing and directing a feature film is something "not many have the opportunity" to do at "such a young age and so early in their careers." Still, he says the experience was "both immensely challenging and genuinely thrilling."

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"To work tirelessly alongside such a committed and talented cast was truly inspiring," he adds. "I’m eternally grateful to all involved for trusting and believing in me."

On Instagram back in December 2022, Damian celebrated the team completing filming on Strictly Confidential, sharing behind-the-scenes photos on Instagram and giving a shout-out to "my beautiful and supreme mother."

"Working together was a dream," he added at the time, also expressing he is "so so proud of this film."

Strictly Confidential is in theaters and on digital April 5.