A cold open, followed by exposition showing the relationships between chief characters, and the suggestion of wholly repugnant, distinctly antagonistic characters. Generally unimportant dialogue and character background, exploration of a labyrinthine locale that's officially closed to the public, and the promise of something sinister just around the corner. Writing, acting, and direction that's perfectly suitable for the horror genre, if overall common and/or unremarkable; original music that is a primary contributor to the atmosphere that the picture can claim; unbothered pacing, resulting in a film of about eighty minutes in length that's not altogether uneventful in almost the full first five-eighths, but not especially striking or compelling, either.
'Deep fear' is well made such as it is, with excellent filming locations and production design, admirable lighting and cinematography, and otherwise solid craftsmanship. The costume design, hair, and makeup are splendid. Filmmaker Grégory Beghin illustrates strong capability in orchestrating shots and scenes, and though Nicolas Tackian's screenplay might not be anything super noteworthy, I do earnestly enjoy the story that he wrote. Though the heaviest horror content doesn't begin to show up until a full hour has passed, the blood, gore and other effects that we do see look fantastic (provided that, as we've observed elsewhere, the camera doesn't totally linger on it). I actually do like the cast; the performances are nothing special, perhaps, but Victor Meutelet, Joseph Olivennes, Kassim Meesters, Léone François-Janssens, and especially Sofia Lesaffre, among others, all ably bring the story to live with the turbulent, heightened emotions of their characters.
I have no major critiques of this movie. I guess the thing is, I have no major praise to offer, either. If it's a horror flick that you want, it's a horror flick that you'll get. There's some atmosphere, some visceral nastiness, and maybe even some thrills to be had. 'Deep fear' is broadly enjoyable and well done, and all that it needed to be; I'll even go so far as to say that it's better than I expected, for what it's worth. Is it anything that you need to go out of your way to see? No. Will it satisfy basic cravings for the genre? Yes, I think it will. It's dark, grisly fun that doesn't reinvent anything, but very ably serves its purpose, and that's enough in my book to earn a fair recommendation.