Jenna (Scout Taylor-Compton), Ian (Travis Van Winkle), Michael (Michael Copon) and Renee (Christina Ulloa) are staying at a lakeside cabin owned by Ian's uncle Wade (Tyler Mane, Michael Myers of the Rob Zombie-directed "Halloween" films starring Scout Taylor-Compton). Before going to a party, they decide to take a hot sauna while Wade is away. What was supposed to be a carefree weekend turns into a nightmare when they (three of them, to be precise) are trapped in a sauna with no way to escape.
The premise of "247F" sounds like the opposite of "Frozen" (2010), in which three skiers are stranded on a chairlift. As in "Frozen," three characters of "247F" (which is about 120C) struggle to escape from this harrowing experience, but their options are limited. The backstory of Scout Taylor-Compton's Jenna, who experienced a traumatic accident three years before, cannot disguise the film's thin story.
This is not to say "247F" is a bad movie. It is slick and shot with realism (the film claims it is based on true events) though it feels a little drawn out and slow at parts. The script is believable and actors all did fine jobs. Directed by Levan Bakhia and Beqa Jguburia, the film also wisely refuses to show us the reason the sauna room door got stuck until the final act.
Maybe this is not the greatest film of the "trapped" genre, but is a decent one.