Watch: Exclusive NSFW 'Mammal' Trailer Exposes Horrific Secrets of Grief at Sundance

Rachel Griffiths has turned in many winning dramatic performances on the small screen, in successful shows like “Six Feet Under” and “Brothers & Sisters,” and it looks like she’s now about to conquer the big screen in a way she never has before. In Rebecca Daly ’s new drama “Mammal,” which will have its world premiere in the World Drama Competition at the 2016 Sundance Film Festival, Griffiths stars as a grieving mother battling both her violent ex-husband (Michael McElhatton) and her interest in the homeless young man ( Barry Keoghan ) she meets at her local swimming pool.

While that storyline alone suggests more than enough drama for its characters, the exclusive trailer above adds layers of sexual intrigue and seductive intensity. In what looks to be a twisted riff on the classic “Vertigo,” Griffiths’ Margaret begins molding the young man into a stand-in for her deceased child. Is she merely trying to be a mother again? Or are her intentions more driven by passion? The trailer blurs the lines in some pretty provocative ways.

Watch the exclusive trailer above.

Watch: Rachel Griffiths Takes a Dive in Exclusive Clip for Sundance Drama ‘Mammal’

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