Gretel tells the story of 17-year-old Lucy, taken against her will five years ago. Caged up with no one left to protect her, she must survive the night or become the killer’s latest victim. After he killed her, she wept. Body bags and chainsaws stripped the night clean. Her mind a mess of revulsion as the silence took over and the girls pleaded for their lives. Had it been five years already? Trapped down in the darkness, away from reality. Now Jess was gone, brutally murdered; she was like a lamb to the slaughter…and tonight was the feast.

Something festive is growing in the sewer... After last year’s tragedy, Douglas’ parents are ignoring Christmas. But when Douglas finds an eerie strand of lights slithering through the sewer, he unwittingly unleashes merry terror upon his neighborhood’s tacky lights contest. String lights spread like invasive kudzu, turning festive decorations into surreal, predatory nightmares.

Noah, Jack, and Phil are three average guys who collect horror memorabilia and have a running competition to see who can come up with the most extreme or repulsive horror movie for their weekly guys’ night. When one of the friends gets the opportunity to steal tickets to an exclusive club that touts offering a realistic, immersive torture simulation, he jumps on the opportunity. Once they arrive at the theater they quickly realize that it isn't a simulation at all, and they have delved into an underground world that they don’t belong in.

Some girls are fearful, others are brave. One girl’s a princess, the next one a slave. But all girls are equal when they’re down in this cave, until just one is left standing—The Prettiest Girl in the Grave.

Ever since their on-again, off-again college romance, Erin hasn’t been able to set a single boundary with charismatic but reckless Silas, who has been chasing the next big high since graduation. When he texts her to spring him out of rehab, she knows enough is enough. She is ready to start a career, make new friends, and meet a great guy—even if that means cutting Silas off. But when Silas turns up dead from an overdose, Erin’s world falls apart.