At first glance, the Devil’s Mouth and Werwulf don’t seem to have a lot in common.

The Devil’s Mouth, starring Kathryn Newton and coming to Prime Video next month, starts off at a sunny creekside picnic where everything seems just fine. On the other hand, the visuals in Robert Eggers’ Werwulf, scheduled for a Christmas release, makes his Puritan scare-fest The Witch seem cheerful in comparison.

But as the trailer plays on it reveals more depth to The Devil’s Mouth than meets the eye, and that’s meant literally. The film’s logline reads, “Five friends explore The Devil’s Mouth cave system in Thailand for one last adventure before life in the real world begins. But they soon discover that something is hunting them under the water…fast, silent, and deadly. In the suffocating darkness, trust erodes, panic spreads and every wrong turn becomes a fight for survival.”

After they leave the sunny shores of wherever they live, they go diving in a suspiciously shark-mouthed cavern, thinking that since it’s a freshwater system, they don’t have to worry about re-enacting any scenes from Jaws. They are of course, wrong. Lurking in the watery depths of the murky, underlit cave swims a shark who obviously doesn’t care what biome its supposed to be inhabiting. It’s here and there’s plenty of people to eat, so it’s not going anywhere.

And neither are the unlucky divers. It’s up to Newton to lead her remaining friends to safety despite there being nowhere to go. Who will make it out of The Devil’s Mouth?

In addition to Newton, The Devil’s Mouth stars Lana Condor, Nico Hiraga, Gavin Casalegno, Tommi Rose, and Tayme Thapthimthong. Jeff Wadlow directed from his screenplay based on a story by Aja Gabel and Myung Joh Wesner.

The Devil’s Mouth streams on Prime beginning on July 29th.

As dank as it is, The Devil’s Mouth cannot compete with Werwulf for creepy weirdness. Eggers, who also directed Nosferatu, takes his distinct arthouse horror style up several notches in the trailer. Sure, there’s the usual Eggers horror menu offerings: desaturated outdoor scenes, weird cult rituals, strange incantations, filth-covered peasants staring at us with haunted eyes, Willem Dafoe looking like he’s about to eat a rat, etc. It’s all there.

But there’s something more sinister happening in Werwulf. We hear the crunching of bones. Star Aaron Taylor-Johnson’s body flexes and contorts unnaturally. Lily-Rose Depp hugs a cow as if she’s trying to protect it, and we see a prolonged closeup of Taylor-Johnson frothing at the mouth as something threatening is happening.

In addition to Taylor-Johnson, Depp, and Dafoe, Werwulf also stars Ralph Ineson, Jack Morris and Bodhi Rae Breathnach. Robert Eggers wrote the screenplay with Sjón, and Jarin Blaschke is the cinematographer, whose stunning work is evident in even the short time allotted for the trailer.

Every frame of the looks is gorgeous, like a portrait you would hang in a small, unused room on the second floor of your house. It’s much harder to appreciate what the movie is about (apart from the obvious conclusions one can draw from the title.) The logline reads, “witness Robert Eggers’ most visceral and haunting experience yet…Focus Features presents Werwulf, a harrowing tale of devotion, damnation and the devil within,” so that’s no help.

You’ll have to wait until Christmas Day and hit up the cineplex to find out what gives with Werwulf.