When you first hit play on Savage Grace, you’re probably thinking it’s just another dysfunctional family drama. By the end of it, you’ll be scooping your jaw off the floor.

Directed by Tom Kalin and starring Julianne Moore, Eddie Redmayne and Hugh Dancy, the film’s based on the true story of the Barbara Baekeland murder—a case that still sends shockwaves through anyone who dares to look into it.

Julianne Moore plays Barbara Baekland, a filthy rich socialite who is way more interested in keeping up her glamorous image than being a homemaker. Her life takes a hard turn when her husband, Brooks (Stephen Dillane), leaves her for their son Tony’s (Redmayne) potential girlfriend. But Tony’s not sweating it. He’s busy wrestling with his own identity, craving love and acceptance from his emotionally unavailable father

Where things really get wild is when Barbara hires Sam (Hugh Dancy), a gay escort, to escort her back into the high society fold after her divorce. What starts as a strategy to regain her place in the world of shallow dinner parties quickly spirals into something deeply unsettling. And then, without giving too much away, it escalates in a way that will leave you thinking, “WUT is happening.”

What makes Savage Grace so shocking isn’t just the twisted relationships, though. It’s how the film slowly lures you into a false sense of normalcy before unleashing one of the most uncomfortable, disturbing plot twists that’s hard to shake. It’s a film about family, obsession and the kind of aching emotional turmoil that can feel like a slow burn before it combusts.

But while the first half of the film lingers on emotional and sensual moments that almost feel like a soap opera, the final acts dive into darkness in a way that’s almost too much to bear. Think Oldboy.

It’s certainly not an easily digestible film but it is well made. Moore’s performance as Barbara starts out intriguing, but as her character unravels, she becomes a cartoonish embodiment of obsession, so extreme that it’s almost like the movie is daring you to stay with it. It’s hard not to feel uncomfortable, but that’s the whole point.

And if you’re not completely floored by the violence and the emotional wreckage that comes with it, you’re probably watching the wrong film. Savage Grace doesn’t give you a neatly tied-up ending or a moral lesson. It’s about the horror of familial ties gone so wrong that they can’t be undone.

When the credits roll, you’re left sitting there, trying to process what you just saw. I personally had to take a nap so I wouldn’t think about it anymore. But if you’re looking for something that’ll give you a serious gut punch and leave you questioning your own sense of morality, this film’s your ticket.