Deborah Ann Woll should feel right at home opposite monsters and supernatural beasts—after all, she once played one on HBO’s True Blood. In The Cycle, however, she trades fangs for forensic tools as Dr. Megan “Meg” Garland, a scientist whose talent for reconstructing the dead forces her to excavate a past she would rather leave buried. What begins as a grisly cold-case investigation gradually mutates into a supernatural nightmare, blending procedural intrigue, family trauma and full-moon savagery into one grimly compelling ride.

The film establishes its morbid mood immediately, rifling through crime-scene photographs, skeletal remains, journal entries and autopsy images before placing Meg at the center of the puzzle. At a body farm, she teaches others how fragments most people would overlook can reveal an entire life. Meg’s job is to understand people in reverse, a fitting skill for a story obsessed with consequences crawling backward through generations. When a mysteriously preserved corpse is identified as Peter Stump, the father who abandoned her decades earlier, the investigation stops being clinical and becomes painfully personal.

Woll gives the film a strong emotional core. Meg is intelligent, composed and justifiably furious, but the case repeatedly fractures her control with intrusive visions and hazy childhood terror. Rather than playing Meg as a conventional scream queen, Woll portrays a woman trying to outthink a force that defies science. Her scenes with Officer Ian and his father, Officer Marks (profoundly portrayed by Jeffrey Donovan) offer glimpses of vulnerability, though the script gives these relationships too little room to develop.

That emotional restraint produces one of the movie’s few notable stumbles. A major death should hit Meg, with greater force, but the aftermath feels oddly muted. The romantic undercurrent is similarly light, like a schoolboy staring at his longtime crush. These shortcomings do not derail the story, but they leave a few character beats noticeably colder than the corpses on Meg’s examination table.

The Cycle more than excels is in its atmosphere. Everything is grey, grim and deliciously icky. Bodies appear where they should not, decomposition refuses to follow the rules, and the absence of something as ordinary as maggots becomes deeply unsettling. The investigation spins through old 911 calls, impossible wounds, human bite marks and a long-buried history involving Meg’s parents. The film keeps its clues moving in circles but rarely feels as though it is simply running in place.

Procedural material gives off a welcome Silence of the Lambs chill, particularly as the bodies multiply and Stump’s corpse begins turning up with impossible regularity. Yet the story is not coy forever. Once its mystery bares its teeth, the restrained forensic thriller erupts into a brutal creature feature. The transformation sequence is gnarly (something like An American Werewolf in London on steroids) and the resulting carnage is vicious, frightening and gleefully uncompromising.

Just as importantly, the monster is more than a delivery system for mutilation. Its connection to several characters gives the horror a tragic undertow. The revelation of who Peter really was, and what he believed his death might prevent, lands with genuine heartbreak. By the climax, Meg is no longer merely identifying the dead; she is confronting the inheritance of violence that has shaped her own life. The final plan turns a family reckoning into a literal fight to break the cycle.